631145604 has 24 divisors (see below), whose sum is σ = 1559301408. Its totient is φ = 198006400.

The previous prime is 631145551. The next prime is 631145633. The reversal of 631145604 is 406541136.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1546722 + ... + 1547129.

It is an arithmetic number, because the mean of its divisors is an integer number (64970892).

Almost surely, 2^631145604 is an apocalyptic number.

It is an amenable number.

631145604 is an abundant number, since it is smaller than the sum of its proper divisors (928155804).

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

631145604 is a wasteful number, since it uses less digits than its factorization.

631145604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3093875 (or 3093873 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 631145604 is about 25122.6114088484. The cubic root of 631145604 is about 857.7811940354.

It can be divided in two parts, 6311 and 45604, that added together give a palindrome (51915).

The spelling of 631145604 in words is "six hundred thirty-one million, one hundred forty-five thousand, six hundred four".