77031232144 has 20 divisors (see below), whose sum is σ = 157103171440. Its totient is φ = 36488478240.

The previous prime is 77031232139. The next prime is 77031232147. The reversal of 77031232144 is 44123213077.

It is not an unprimeable number, because it can be changed into a prime (77031232147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126695802 + ... + 126696409.

It is an arithmetic number, because the mean of its divisors is an integer number (7855158572).

Almost surely, 2^77031232144 is an apocalyptic number.

It is an amenable number.

77031232144 is an abundant number, since it is smaller than the sum of its proper divisors (80071939296).

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

77031232144 is a wasteful number, since it uses less digits than its factorization.

77031232144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253392238 (or 253392232 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 34.

The spelling of 77031232144 in words is "seventy-seven billion, thirty-one million, two hundred thirty-two thousand, one hundred forty-four".