716561631 has 12 divisors (see below), whose sum is σ = 1036786608. Its totient is φ = 476898624.

The previous prime is 716561597. The next prime is 716561641. The reversal of 716561631 is 136165617.

716561631 is a `hidden beast` number, since 7 + 1 + 6 + 5 + 616 + 31 = 666.

It is not a de Polignac number, because 716561631 - 2⁶ = 716561567 is a prime.

It is a super-2 number, since 2×716561631² = 1026921142042760322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (716561641) 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, 61795 + ... + 72468.

It is an arithmetic number, because the mean of its divisors is an integer number (86398884).

Almost surely, 2^716561631 is an apocalyptic number.

716561631 is a deficient number, since it is larger than the sum of its proper divisors (320224977).

716561631 is a wasteful number, since it uses less digits than its factorization.

716561631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134862 (or 134859 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 716561631 is about 26768.6688313035. The cubic root of 716561631 is about 894.8519385130.

The spelling of 716561631 in words is "seven hundred sixteen million, five hundred sixty-one thousand, six hundred thirty-one".