631344556 has 6 divisors (see below), whose sum is σ = 1104852980. Its totient is φ = 315672276.

The previous prime is 631344523. The next prime is 631344569. The reversal of 631344556 is 655443136.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78918066 + ... + 78918073.

Almost surely, 2^631344556 is an apocalyptic number.

It is an amenable number.

631344556 is a deficient number, since it is larger than the sum of its proper divisors (473508424).

631344556 is a wasteful number, since it uses less digits than its factorization.

631344556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157836143 (or 157836141 counting only the distinct ones).

The product of its digits is 129600, while the sum is 37.

The square root of 631344556 is about 25126.5707170716. The cubic root of 631344556 is about 857.8713155300.

The spelling of 631344556 in words is "six hundred thirty-one million, three hundred forty-four thousand, five hundred fifty-six".