77964788692 has 48 divisors (see below), whose sum is σ = 161921031552. Its totient is φ = 32151928320.

The previous prime is 77964788653. The next prime is 77964788813. The reversal of 77964788692 is 29688746977.

It is a super-2 number, since 2×77964788692² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (73).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 381358 + ... + 548965.

It is an arithmetic number, because the mean of its divisors is an integer number (3373354824).

Almost surely, 2^77964788692 is an apocalyptic number.

It is an amenable number.

77964788692 is an abundant number, since it is smaller than the sum of its proper divisors (83956242860).

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

77964788692 is a wasteful number, since it uses less digits than its factorization.

77964788692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930448 (or 930446 counting only the distinct ones).

The product of its digits is 512096256, while the sum is 73.

The spelling of 77964788692 in words is "seventy-seven billion, nine hundred sixty-four million, seven hundred eighty-eight thousand, six hundred ninety-two".