631706421171 has 48 divisors (see below), whose sum is σ = 993552134400. Its totient is φ = 355921860672.

The previous prime is 631706421169. The next prime is 631706421193. The reversal of 631706421171 is 171124607136.

It is a happy number.

It is not a de Polignac number, because 631706421171 - 2¹ = 631706421169 is a prime.

It is a super-2 number, since 2×631706421171² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (631706421571) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6159450 + ... + 6261168.

It is an arithmetic number, because the mean of its divisors is an integer number (20699002800).

Almost surely, 2^631706421171 is an apocalyptic number.

631706421171 is a deficient number, since it is larger than the sum of its proper divisors (361845713229).

631706421171 is a wasteful number, since it uses less digits than its factorization.

631706421171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102328 (or 102321 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The spelling of 631706421171 in words is "six hundred thirty-one billion, seven hundred six million, four hundred twenty-one thousand, one hundred seventy-one".