71659006864 has 15 divisors (see below), whose sum is σ = 138841400443. Its totient is φ = 35828968048.

The previous prime is 71659006847. The next prime is 71659006879. The reversal of 71659006864 is 46860095617.

The square root of 71659006864 is 267692.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×71659006864² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1037307 + ... + 1104229.

Almost surely, 2^71659006864 is an apocalyptic number.

71659006864 is the 267692-nd square number.

It is an amenable number.

71659006864 is a deficient number, since it is larger than the sum of its proper divisors (67182393579).

71659006864 is an frugal number, since it uses more digits than its factorization.

71659006864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133854 (or 66925 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 71659006864 in words is "seventy-one billion, six hundred fifty-nine million, six thousand, eight hundred sixty-four".