718871631 has 16 divisors (see below), whose sum is σ = 1036214400. Its totient is φ = 441751968.

The previous prime is 718871599. The next prime is 718871651. The reversal of 718871631 is 136178817.

It is not a de Polignac number, because 718871631 - 2⁵ = 718871599 is a prime.

It is a super-2 number, since 2×718871631² = 1033552843713200322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (718871651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168321 + ... + 172538.

It is an arithmetic number, because the mean of its divisors is an integer number (64763400).

Almost surely, 2^718871631 is an apocalyptic number.

718871631 is a deficient number, since it is larger than the sum of its proper divisors (317342769).

718871631 is a wasteful number, since it uses less digits than its factorization.

718871631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340918.

The product of its digits is 56448, while the sum is 42.

The square root of 718871631 is about 26811.7815707946. The cubic root of 718871631 is about 895.8124935644.

The spelling of 718871631 in words is "seven hundred eighteen million, eight hundred seventy-one thousand, six hundred thirty-one".