631263864 has 96 divisors (see below), whose sum is σ = 2002752000. Its totient is φ = 163961280.

The previous prime is 631263863. The next prime is 631263869. The reversal of 631263864 is 468362136.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631263863) 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, 11464 + ... + 37335.

It is an arithmetic number, because the mean of its divisors is an integer number (20862000).

Almost surely, 2^631263864 is an apocalyptic number.

It is an amenable number.

631263864 is an abundant number, since it is smaller than the sum of its proper divisors (1371488136).

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

631263864 is a wasteful number, since it uses less digits than its factorization.

631263864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48833 (or 48822 counting only the distinct ones).

The product of its digits is 124416, while the sum is 39.

The square root of 631263864 is about 25124.9649551994. The cubic root of 631263864 is about 857.8347658621.

The spelling of 631263864 in words is "six hundred thirty-one million, two hundred sixty-three thousand, eight hundred sixty-four".