77857672160 has 24 divisors (see below), whose sum is σ = 183938750856. Its totient is φ = 31143068800.

The previous prime is 77857672129. The next prime is 77857672171. The reversal of 77857672160 is 6127675877.

It is a happy number.

It is a super-2 number, since 2×77857672160² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77857672096 and 77857672105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243305066 + ... + 243305385.

It is an arithmetic number, because the mean of its divisors is an integer number (7664114619).

Almost surely, 2^77857672160 is an apocalyptic number.

It is an amenable number.

77857672160 is an abundant number, since it is smaller than the sum of its proper divisors (106081078696).

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

77857672160 is a wasteful number, since it uses less digits than its factorization.

77857672160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486610466 (or 486610458 counting only the distinct ones).

The product of its (nonzero) digits is 6914880, while the sum is 56.

The spelling of 77857672160 in words is "seventy-seven billion, eight hundred fifty-seven million, six hundred seventy-two thousand, one hundred sixty".