77913229768 has 32 divisors (see below), whose sum is σ = 163074209760. Its totient is φ = 34591495680.

The previous prime is 77913229739. The next prime is 77913229799. The reversal of 77913229768 is 86792231977.

It is a super-2 number, since 2×77913229768² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10291305 + ... + 10298872.

It is an arithmetic number, because the mean of its divisors is an integer number (5096069055).

Almost surely, 2^77913229768 is an apocalyptic number.

It is an amenable number.

77913229768 is an abundant number, since it is smaller than the sum of its proper divisors (85160979992).

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

77913229768 is a wasteful number, since it uses less digits than its factorization.

77913229768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20590237 (or 20590233 counting only the distinct ones).

The product of its digits is 16003008, while the sum is 61.

The spelling of 77913229768 in words is "seventy-seven billion, nine hundred thirteen million, two hundred twenty-nine thousand, seven hundred sixty-eight".