631032172893 has 40 divisors (see below), whose sum is σ = 969025375296. Its totient is φ = 409080974400.

The previous prime is 631032172891. The next prime is 631032172937. The reversal of 631032172893 is 398271230136.

631032172893 is a `hidden beast` number, since 6 + 310 + 321 + 7 + 2 + 8 + 9 + 3 = 666.

It is not a de Polignac number, because 631032172893 - 2¹ = 631032172891 is a prime.

It is a super-2 number, since 2×631032172893² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631032172891) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 331723 + ... + 1171368.

Almost surely, 2^631032172893 is an apocalyptic number.

It is an amenable number.

631032172893 is a deficient number, since it is larger than the sum of its proper divisors (337993202403).

631032172893 is a wasteful number, since it uses less digits than its factorization.

631032172893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503247 (or 1503238 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 631032172893 in words is "six hundred thirty-one billion, thirty-two million, one hundred seventy-two thousand, eight hundred ninety-three".