631773136 has 10 divisors (see below), whose sum is σ = 1224060482. Its totient is φ = 315886560.

The previous prime is 631773119. The next prime is 631773139. The reversal of 631773136 is 631377136.

It can be written as a sum of positive squares in only one way, i.e., 355548736 + 276224400 = 18856^2 + 16620^2 .

It is a junction number, because it is equal to n+sod(n) for n = 631773095 and 631773104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631773139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19742895 + ... + 19742926.

Almost surely, 2^631773136 is an apocalyptic number.

It is an amenable number.

631773136 is a deficient number, since it is larger than the sum of its proper divisors (592287346).

631773136 is a wasteful number, since it uses less digits than its factorization.

631773136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39485829 (or 39485823 counting only the distinct ones).

The product of its digits is 47628, while the sum is 37.

The square root of 631773136 is about 25135.0976922709. The cubic root of 631773136 is about 858.0653898650.

The spelling of 631773136 in words is "six hundred thirty-one million, seven hundred seventy-three thousand, one hundred thirty-six".