231640662576 has 120 divisors (see below), whose sum is σ = 652857825040. Its totient is φ = 70707326976.

The previous prime is 231640662569. The next prime is 231640662629. The reversal of 231640662576 is 675266046132.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 287610 + ... + 738918.

Almost surely, 2^231640662576 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 231640662576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326428912520).

231640662576 is an abundant number, since it is smaller than the sum of its proper divisors (421217162464).

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

231640662576 is a wasteful number, since it uses less digits than its factorization.

231640662576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451391 (or 451368 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 48.

The spelling of 231640662576 in words is "two hundred thirty-one billion, six hundred forty million, six hundred sixty-two thousand, five hundred seventy-six".