77047678992 has 20 divisors (see below), whose sum is σ = 199039837520. Its totient is φ = 25682559648.

The previous prime is 77047678979. The next prime is 77047679039. The reversal of 77047678992 is 29987674077.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 802579942 + ... + 802580037.

It is an arithmetic number, because the mean of its divisors is an integer number (9951991876).

Almost surely, 2^77047678992 is an apocalyptic number.

It is an amenable number.

77047678992 is an abundant number, since it is smaller than the sum of its proper divisors (121992158528).

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

77047678992 is a wasteful number, since it uses less digits than its factorization.

77047678992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605159990 (or 1605159984 counting only the distinct ones).

The product of its (nonzero) digits is 74680704, while the sum is 66.

The spelling of 77047678992 in words is "seventy-seven billion, forty-seven million, six hundred seventy-eight thousand, nine hundred ninety-two".