77964788492 has 12 divisors (see below), whose sum is σ = 136493702520. Its totient is φ = 38966587776.

The previous prime is 77964788471. The next prime is 77964788509. The reversal of 77964788492 is 29488746977.

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, 3940517 + ... + 3960252.

It is an arithmetic number, because the mean of its divisors is an integer number (11374475210).

Almost surely, 2^77964788492 is an apocalyptic number.

It is an amenable number.

77964788492 is a deficient number, since it is larger than the sum of its proper divisors (58528914028).

77964788492 is a wasteful number, since it uses less digits than its factorization.

77964788492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7903240 (or 7903238 counting only the distinct ones).

The product of its digits is 341397504, while the sum is 71.

The spelling of 77964788492 in words is "seventy-seven billion, nine hundred sixty-four million, seven hundred eighty-eight thousand, four hundred ninety-two".