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55565808783408 = 2433711101107154571
BaseRepresentation
bin11001010001001011011000…
…10010110101000000110000
321021202001001202022200101000
430220211230102311000300
524240342234022032113
6314102325151442000
714463332353453140
oct1450455422650060
9237661052280330
1055565808783408
1116783366508050
126295038b26300
132500aaa95a821
14da15842dc920
156655da67d373
hex32896c4b5030

55565808783408 has 640 divisors, whose sum is σ = 202697163694080. Its totient is φ = 14156138880000.

The previous prime is 55565808783391. The next prime is 55565808783409. The reversal of 55565808783408 is 80438780856555.

55565808783408 is a `hidden beast` number, since 5 + 5 + 5 + 6 + 580 + 8 + 7 + 8 + 34 + 0 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (55565808783409) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 359406763 + ... + 359561333.

It is an arithmetic number, because the mean of its divisors is an integer number (316714318272).

Almost surely, 255565808783408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55565808783408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101348581847040).

55565808783408 is an abundant number, since it is smaller than the sum of its proper divisors (147131354910672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55565808783408 is a wasteful number, since it uses less digits than its factorization.

55565808783408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154814 (or 154802 counting only the distinct ones).

The product of its (nonzero) digits is 1290240000, while the sum is 72.

The spelling of 55565808783408 in words is "fifty-five trillion, five hundred sixty-five billion, eight hundred eight million, seven hundred eighty-three thousand, four hundred eight".