231647673561 has 16 divisors (see below), whose sum is σ = 328772577600. Its totient is φ = 144659927808.

The previous prime is 231647673559. The next prime is 231647673571. The reversal of 231647673561 is 165376746132.

It is not a de Polignac number, because 231647673561 - 2¹ = 231647673559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231647673541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22826356 + ... + 22836501.

It is an arithmetic number, because the mean of its divisors is an integer number (20548286100).

Almost surely, 2^231647673561 is an apocalyptic number.

It is an amenable number.

231647673561 is a deficient number, since it is larger than the sum of its proper divisors (97124904039).

231647673561 is a wasteful number, since it uses less digits than its factorization.

231647673561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45662968.

The product of its digits is 3810240, while the sum is 51.

The spelling of 231647673561 in words is "two hundred thirty-one billion, six hundred forty-seven million, six hundred seventy-three thousand, five hundred sixty-one".