1231663864 has 16 divisors (see below), whose sum is σ = 2319546600. Its totient is φ = 613118112.

The previous prime is 1231663841. The next prime is 1231663877. The reversal of 1231663864 is 4683661321.

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, 337299 + ... + 340930.

Almost surely, 2^1231663864 is an apocalyptic number.

It is an amenable number.

1231663864 is a deficient number, since it is larger than the sum of its proper divisors (1087882736).

1231663864 is a wasteful number, since it uses less digits than its factorization.

1231663864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678462 (or 678458 counting only the distinct ones).

The product of its digits is 124416, while the sum is 40.

The square root of 1231663864 is about 35095.0689413769. The cubic root of 1231663864 is about 1071.9241773616.

The spelling of 1231663864 in words is "one billion, two hundred thirty-one million, six hundred sixty-three thousand, eight hundred sixty-four".