631046173572 has 18 divisors (see below), whose sum is σ = 1595144494398. Its totient is φ = 210348724512.

The previous prime is 631046173561. The next prime is 631046173603. The reversal of 631046173572 is 275371640136.

631046173572 is a `hidden beast` number, since 6 + 3 + 1 + 0 + 4 + 6 + 1 + 73 + 572 = 666.

It can be written as a sum of positive squares in only one way, i.e., 466125714756 + 164920458816 = 682734^2 + 406104^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8764530153 + ... + 8764530224.

Almost surely, 2^631046173572 is an apocalyptic number.

It is an amenable number.

631046173572 is an abundant number, since it is smaller than the sum of its proper divisors (964098320826).

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

631046173572 is a wasteful number, since it uses less digits than its factorization.

631046173572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17529060387 (or 17529060382 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 45.

The spelling of 631046173572 in words is "six hundred thirty-one billion, forty-six million, one hundred seventy-three thousand, five hundred seventy-two".