77957601756 has 72 divisors (see below), whose sum is σ = 191584323840. Its totient is φ = 24664363584.

The previous prime is 77957601721. The next prime is 77957601763. The reversal of 77957601756 is 65710675977.

It is a self number, because there is not a number n which added to its sum of digits gives 77957601756.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 529965 + ... + 660891.

Almost surely, 2^77957601756 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 77957601756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95792161920).

77957601756 is an abundant number, since it is smaller than the sum of its proper divisors (113626722084).

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

77957601756 is a wasteful number, since it uses less digits than its factorization.

77957601756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131051 (or 131020 counting only the distinct ones).

The product of its (nonzero) digits is 19448100, while the sum is 60.

The spelling of 77957601756 in words is "seventy-seven billion, nine hundred fifty-seven million, six hundred one thousand, seven hundred fifty-six".