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78201683040 = 25351329432149
BaseRepresentation
bin100100011010100101…
…1101111110001100000
321110212000021002220010
41020311023233301200
52240124112324130
655531513244520
75435624224005
oct1106513576140
9243760232803
1078201683040
113018a8a1a18
12131a5703740
1374b36b3b40
143adbdbd8ac
15207a6990b0
hex12352efc60

78201683040 has 192 divisors, whose sum is σ = 274432536000. Its totient is φ = 18585821184.

The previous prime is 78201683029. The next prime is 78201683113. The reversal of 78201683040 is 4038610287.

It is a super-2 number, since 2×782016830402 (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 78201683040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35115 + ... + 397034.

It is an arithmetic number, because the mean of its divisors is an integer number (1429336125).

Almost surely, 278201683040 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 78201683040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137216268000).

78201683040 is an abundant number, since it is smaller than the sum of its proper divisors (196230852960).

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

78201683040 is a wasteful number, since it uses less digits than its factorization.

78201683040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432209 (or 432201 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The spelling of 78201683040 in words is "seventy-eight billion, two hundred one million, six hundred eighty-three thousand, forty".