631647672 has 16 divisors (see below), whose sum is σ = 1579119240. Its totient is φ = 210549216.

The previous prime is 631647557. The next prime is 631647719. The reversal of 631647672 is 276746136.

It is a happy number.

631647672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 13159303 + ... + 13159350.

Almost surely, 2^631647672 is an apocalyptic number.

It is an amenable number.

631647672 is an abundant number, since it is smaller than the sum of its proper divisors (947471568).

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

631647672 is a wasteful number, since it uses less digits than its factorization.

631647672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26318662 (or 26318658 counting only the distinct ones).

The product of its digits is 254016, while the sum is 42.

The square root of 631647672 is about 25132.6017753833. The cubic root of 631647672 is about 858.0085849577.

The spelling of 631647672 in words is "six hundred thirty-one million, six hundred forty-seven thousand, six hundred seventy-two".