231708867660 has 72 divisors (see below), whose sum is σ = 703390353120. Its totient is φ = 61741548288.

The previous prime is 231708867641. The next prime is 231708867667. The reversal of 231708867660 is 66768807132.

It is a junction number, because it is equal to n+sod(n) for n = 231708867597 and 231708867606.

It is not an unprimeable number, because it can be changed into a prime (231708867667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 259425 + ... + 728504.

It is an arithmetic number, because the mean of its divisors is an integer number (9769310460).

Almost surely, 2^231708867660 is an apocalyptic number.

231708867660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231708867660 is an abundant number, since it is smaller than the sum of its proper divisors (471681485460).

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

231708867660 is a wasteful number, since it uses less digits than its factorization.

231708867660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989247 (or 989242 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 231708867660 in words is "two hundred thirty-one billion, seven hundred eight million, eight hundred sixty-seven thousand, six hundred sixty".