55767620992860 has 720 divisors, whose sum is σ = 204220614939264. Its totient is φ = 12702322499328.

The previous prime is 55767620992841. The next prime is 55767620992969. The reversal of 55767620992860 is 6829902676755.

It is a happy number.

55767620992860 is a `hidden beast` number, since 5 + 5 + 76 + 76 + 209 + 9 + 286 + 0 = 666.

It is a super-2 number, since 2×55767620992860² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 42668416327 + ... + 42668417633.

Almost surely, 2^{55767620992860} 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 55767620992860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102110307469632).

55767620992860 is an abundant number, since it is smaller than the sum of its proper divisors (148452993946404).

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

55767620992860 is a wasteful number, since it uses less digits than its factorization.

55767620992860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2812 (or 2794 counting only the distinct ones).

The product of its (nonzero) digits is 685843200, while the sum is 72.

The spelling of 55767620992860 in words is "fifty-five trillion, seven hundred sixty-seven billion, six hundred twenty million, nine hundred ninety-two thousand, eight hundred sixty".