71493115256 has 32 divisors (see below), whose sum is σ = 141955759440. Its totient is φ = 33638865408.

The previous prime is 71493115249. The next prime is 71493115261. The reversal of 71493115256 is 65251139417.

It is a super-2 number, since 2×71493115256² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 988190 + ... + 1058066.

Almost surely, 2^71493115256 is an apocalyptic number.

It is an amenable number.

71493115256 is a deficient number, since it is larger than the sum of its proper divisors (70462644184).

71493115256 is a wasteful number, since it uses less digits than its factorization.

71493115256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77423 (or 77419 counting only the distinct ones).

The product of its digits is 226800, while the sum is 44.

The spelling of 71493115256 in words is "seventy-one billion, four hundred ninety-three million, one hundred fifteen thousand, two hundred fifty-six".