77494927080 has 32 divisors (see below), whose sum is σ = 232484781600. Its totient is φ = 20665313856.

The previous prime is 77494927073. The next prime is 77494927109. The reversal of 77494927080 is 8072949477.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 77494927080.

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, 322895410 + ... + 322895649.

It is an arithmetic number, because the mean of its divisors is an integer number (7265149425).

Almost surely, 2^77494927080 is an apocalyptic number.

It is an amenable number.

77494927080 is an abundant number, since it is smaller than the sum of its proper divisors (154989854520).

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

77494927080 is a wasteful number, since it uses less digits than its factorization.

77494927080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645791073 (or 645791069 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 57.

The spelling of 77494927080 in words is "seventy-seven billion, four hundred ninety-four million, nine hundred twenty-seven thousand, eighty".