231616889856 has 880 divisors, whose sum is σ = 821766021120. Its totient is φ = 64198656000.

The previous prime is 231616889843. The next prime is 231616889863. The reversal of 231616889856 is 658988616132.

231616889856 is a `hidden beast` number, since 2 + 3 + 1 + 616 + 8 + 8 + 9 + 8 + 5 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 231616889793 and 231616889802.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 537393961 + ... + 537394391.

It is an arithmetic number, because the mean of its divisors is an integer number (933825024).

Almost surely, 2^231616889856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231616889856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (410883010560).

231616889856 is an abundant number, since it is smaller than the sum of its proper divisors (590149131264).

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

231616889856 is a wasteful number, since it uses less digits than its factorization.

231616889856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524 (or 497 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 63.

The spelling of 231616889856 in words is "two hundred thirty-one billion, six hundred sixteen million, eight hundred eighty-nine thousand, eight hundred fifty-six".