631425616 has 10 divisors (see below), whose sum is σ = 1223387162. Its totient is φ = 315712800.

The previous prime is 631425569. The next prime is 631425617. The reversal of 631425616 is 616524136.

It can be written as a sum of positive squares in only one way, i.e., 361152016 + 270273600 = 19004^2 + 16440^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631425617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19732035 + ... + 19732066.

Almost surely, 2^631425616 is an apocalyptic number.

It is an amenable number.

631425616 is a deficient number, since it is larger than the sum of its proper divisors (591961546).

631425616 is a wasteful number, since it uses less digits than its factorization.

631425616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39464109 (or 39464103 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 631425616 is about 25128.1836987873. The cubic root of 631425616 is about 857.9080287491.

The spelling of 631425616 in words is "six hundred thirty-one million, four hundred twenty-five thousand, six hundred sixteen".