77904624996 has 81 divisors (see below), whose sum is σ = 216506585113. Its totient is φ = 23601879840.

The previous prime is 77904624979. The next prime is 77904625003. The reversal of 77904624996 is 69942640977.

The square root of 77904624996 is 279114.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 77610159396 + 294465600 = 278586^2 + 17160^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 18419410 + ... + 18423638.

Almost surely, 2^77904624996 is an apocalyptic number.

77904624996 is the 279114-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77904624996

77904624996 is an abundant number, since it is smaller than the sum of its proper divisors (138601960117).

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

77904624996 is a wasteful number, since it uses less digits than its factorization.

77904624996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8490 (or 4245 counting only the distinct ones).

The product of its (nonzero) digits is 41150592, while the sum is 63.

The spelling of 77904624996 in words is "seventy-seven billion, nine hundred four million, six hundred twenty-four thousand, nine hundred ninety-six".