231871610616 has 16 divisors (see below), whose sum is σ = 579679026600. Its totient is φ = 77290536864.

The previous prime is 231871610603. The next prime is 231871610651. The reversal of 231871610616 is 616016178132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4830658531 + ... + 4830658578.

Almost surely, 2^231871610616 is an apocalyptic number.

It is an amenable number.

231871610616 is an abundant number, since it is smaller than the sum of its proper divisors (347807415984).

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

231871610616 is a wasteful number, since it uses less digits than its factorization.

231871610616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9661317118 (or 9661317114 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

Adding to 231871610616 its reverse (616016178132), we get a palindrome (847887788748).

The spelling of 231871610616 in words is "two hundred thirty-one billion, eight hundred seventy-one million, six hundred ten thousand, six hundred sixteen".