231564856320 has 704 divisors, whose sum is σ = 950583567360. Its totient is φ = 52362215424.

The previous prime is 231564856319. The next prime is 231564856343. The reversal of 231564856320 is 23658465132.

231564856320 is a `hidden beast` number, since 2 + 3 + 1 + 5 + 6 + 4 + 8 + 5 + 632 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 93863727 + ... + 93866193.

Almost surely, 2^231564856320 is an apocalyptic number.

231564856320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231564856320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (475291783680).

231564856320 is an abundant number, since it is smaller than the sum of its proper divisors (719018711040).

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

231564856320 is a wasteful number, since it uses less digits than its factorization.

231564856320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2605 (or 2581 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 231564856320 in words is "two hundred thirty-one billion, five hundred sixty-four million, eight hundred fifty-six thousand, three hundred twenty".