231445636655646 has 32 divisors (see below), whose sum is σ = 560137339134720. Its totient is φ = 62237482125696.

The previous prime is 231445636655641. The next prime is 231445636655647. The reversal of 231445636655646 is 646556636544132.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231445636655641) 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, 162076775656 + ... + 162076777083.

It is an arithmetic number, because the mean of its divisors is an integer number (17504291847960).

Almost surely, 2^{231445636655646} is an apocalyptic number.

231445636655646 is an abundant number, since it is smaller than the sum of its proper divisors (328691702479074).

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

231445636655646 is a wasteful number, since it uses less digits than its factorization.

231445636655646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324153552768.

The product of its digits is 1119744000, while the sum is 66.

The spelling of 231445636655646 in words is "two hundred thirty-one trillion, four hundred forty-five billion, six hundred thirty-six million, six hundred fifty-five thousand, six hundred forty-six".