631837161 has 12 divisors (see below), whose sum is σ = 912873988. Its totient is φ = 421123104.

The previous prime is 631837099. The next prime is 631837177. The reversal of 631837161 is 161738136.

631837161 is a `hidden beast` number, since 631 + 8 + 3 + 7 + 16 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 537358761 + 94478400 = 23181^2 + 9720^2 .

It is not a de Polignac number, because 631837161 - 2¹⁸ = 631575017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631837961) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60051 + ... + 69783.

Almost surely, 2^631837161 is an apocalyptic number.

It is an amenable number.

631837161 is a deficient number, since it is larger than the sum of its proper divisors (281036827).

631837161 is a wasteful number, since it uses less digits than its factorization.

631837161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16952 (or 16949 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 631837161 is about 25136.3712774935. The cubic root of 631837161 is about 858.0943748375.

The spelling of 631837161 in words is "six hundred thirty-one million, eight hundred thirty-seven thousand, one hundred sixty-one".