231555694864528 has 40 divisors (see below), whose sum is σ = 450249253673912. Its totient is φ = 115362961579008.

The previous prime is 231555694864493. The next prime is 231555694864537. The reversal of 231555694864528 is 825468496555132.

It can be written as a sum of positive squares in 4 ways, for example, as 46901513947024 + 184654180917504 = 6848468^2 + 13588752^2 .

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, 13500675 + ... + 25404322.

Almost surely, 2^{231555694864528} is an apocalyptic number.

It is an amenable number.

231555694864528 is a deficient number, since it is larger than the sum of its proper divisors (218693558809384).

231555694864528 is a wasteful number, since it uses less digits than its factorization.

231555694864528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38906339 (or 38906333 counting only the distinct ones).

The product of its digits is 2488320000, while the sum is 73.

The spelling of 231555694864528 in words is "two hundred thirty-one trillion, five hundred fifty-five billion, six hundred ninety-four million, eight hundred sixty-four thousand, five hundred twenty-eight".