231640164441 has 12 divisors (see below), whose sum is σ = 382390112832. Its totient is φ = 132365808216.

The previous prime is 231640164337. The next prime is 231640164443. The reversal of 231640164441 is 144461046132.

231640164441 is a `hidden beast` number, since 2 + 3 + 1 + 6 + 4 + 0 + 1 + 644 + 4 + 1 = 666.

It is not a de Polignac number, because 231640164441 - 2¹⁸ = 231639902297 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 231640164396 and 231640164405.

It is not an unprimeable number, because it can be changed into a prime (231640164443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1838413941 + ... + 1838414066.

It is an arithmetic number, because the mean of its divisors is an integer number (31865842736).

Almost surely, 2^231640164441 is an apocalyptic number.

231640164441 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

231640164441 is a deficient number, since it is larger than the sum of its proper divisors (150749948391).

231640164441 is a wasteful number, since it uses less digits than its factorization.

231640164441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3676828020 (or 3676828017 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The spelling of 231640164441 in words is "two hundred thirty-one billion, six hundred forty million, one hundred sixty-four thousand, four hundred forty-one".