71398879504 has 20 divisors (see below), whose sum is σ = 138638046364. Its totient is φ = 35621319168.

The previous prime is 71398879477. The next prime is 71398879511. The reversal of 71398879504 is 40597889317.

It can be written as a sum of positive squares in 2 ways, for example, as 52968101904 + 18430777600 = 230148^2 + 135760^2 .

It is a super-2 number, since 2×71398879504² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4874997 + ... + 4889620.

Almost surely, 2^71398879504 is an apocalyptic number.

It is an amenable number.

71398879504 is a deficient number, since it is larger than the sum of its proper divisors (67239166860).

71398879504 is a wasteful number, since it uses less digits than its factorization.

71398879504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9765082 (or 9765076 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 61.

The spelling of 71398879504 in words is "seventy-one billion, three hundred ninety-eight million, eight hundred seventy-nine thousand, five hundred four".