631340636 has 12 divisors (see below), whose sum is σ = 1105391112. Its totient is φ = 315514608.

The previous prime is 631340629. The next prime is 631340737. The reversal of 631340636 is 636043136.

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, 29555 + ... + 46218.

It is an arithmetic number, because the mean of its divisors is an integer number (92115926).

Almost surely, 2^631340636 is an apocalyptic number.

It is an amenable number.

631340636 is a deficient number, since it is larger than the sum of its proper divisors (474050476).

631340636 is a wasteful number, since it uses less digits than its factorization.

631340636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77860 (or 77858 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 32.

The square root of 631340636 is about 25126.4927118768. The cubic root of 631340636 is about 857.8695400270.

The spelling of 631340636 in words is "six hundred thirty-one million, three hundred forty thousand, six hundred thirty-six".