77431165123 has 48 divisors (see below), whose sum is σ = 91369978560. Its totient is φ = 65175552000.

The previous prime is 77431165117. The next prime is 77431165127. The reversal of 77431165123 is 32156113477.

It is not a de Polignac number, because 77431165123 - 2²⁵ = 77397610691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77431165127) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23257923 + ... + 23261251.

It is an arithmetic number, because the mean of its divisors is an integer number (1903541220).

Almost surely, 2^77431165123 is an apocalyptic number.

77431165123 is a deficient number, since it is larger than the sum of its proper divisors (13938813437).

77431165123 is a wasteful number, since it uses less digits than its factorization.

77431165123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3568 (or 3551 counting only the distinct ones).

The product of its digits is 105840, while the sum is 40.

The spelling of 77431165123 in words is "seventy-seven billion, four hundred thirty-one million, one hundred sixty-five thousand, one hundred twenty-three".