55513564621650 has 240 divisors, whose sum is σ = 156068164882080. Its totient is φ = 14629362566400.

The previous prime is 55513564621643. The next prime is 55513564621661. The reversal of 55513564621650 is 5612646531555.

55513564621650 is a `hidden beast` number, since 5 + 5 + 5 + 1 + 3 + 5 + 6 + 4 + 621 + 6 + 5 + 0 = 666.

It is a super-2 number, since 2×55513564621650² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 177083545 + ... + 177396755.

It is an arithmetic number, because the mean of its divisors is an integer number (650284020342).

Almost surely, 2^{55513564621650} is an apocalyptic number.

55513564621650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55513564621650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78034082441040).

55513564621650 is an abundant number, since it is smaller than the sum of its proper divisors (100554600260430).

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

55513564621650 is a wasteful number, since it uses less digits than its factorization.

55513564621650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313751 (or 313737 counting only the distinct ones).

The product of its (nonzero) digits is 16200000, while the sum is 54.

The spelling of 55513564621650 in words is "fifty-five trillion, five hundred thirteen billion, five hundred sixty-four million, six hundred twenty-one thousand, six hundred fifty".