77922465992 has 108 divisors (see below), whose sum is σ = 177959528145. Its totient is φ = 31891261248.

The previous prime is 77922465989. The next prime is 77922465997. The reversal of 77922465992 is 29956422977.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 43403055556 + 34519410436 = 208334^2 + 185794^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=197386.

It is not an unprimeable number, because it can be changed into a prime (77922465997) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 127116278 + ... + 127116890.

Almost surely, 2^77922465992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77922465992

77922465992 is an abundant number, since it is smaller than the sum of its proper divisors (100037062153).

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

77922465992 is an equidigital number, since it uses as much as digits as its factorization.

77922465992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292 (or 645 counting only the distinct ones).

The product of its digits is 34292160, while the sum is 62.

The spelling of 77922465992 in words is "seventy-seven billion, nine hundred twenty-two million, four hundred sixty-five thousand, nine hundred ninety-two".