231640788964 has 18 divisors (see below), whose sum is σ = 438952443090. Its totient is φ = 106911133056.

The previous prime is 231640788959. The next prime is 231640788983. The reversal of 231640788964 is 469887046132.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 19265440000 + 212375348964 = 138800^2 + 460842^2 .

It is a super-2 number, since 2×231640788964² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231640788899 and 231640788908.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 171331269 + ... + 171332620.

Almost surely, 2^231640788964 is an apocalyptic number.

It is an amenable number.

231640788964 is a deficient number, since it is larger than the sum of its proper divisors (207311654126).

231640788964 is a wasteful number, since it uses less digits than its factorization.

231640788964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342663919 (or 342663904 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 58.

The spelling of 231640788964 in words is "two hundred thirty-one billion, six hundred forty million, seven hundred eighty-eight thousand, nine hundred sixty-four".