71897915872 has 12 divisors (see below), whose sum is σ = 141549021936. Its totient is φ = 35948957920.

The previous prime is 71897915867. The next prime is 71897915897. The reversal of 71897915872 is 27851979817.

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 as a sum of consecutive naturals, namely, 1123404904 + ... + 1123404967.

It is an arithmetic number, because the mean of its divisors is an integer number (11795751828).

Almost surely, 2^71897915872 is an apocalyptic number.

It is an amenable number.

71897915872 is a deficient number, since it is larger than the sum of its proper divisors (69651106064).

71897915872 is a wasteful number, since it uses less digits than its factorization.

71897915872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2246809881 (or 2246809873 counting only the distinct ones).

The product of its digits is 17781120, while the sum is 64.

The spelling of 71897915872 in words is "seventy-one billion, eight hundred ninety-seven million, nine hundred fifteen thousand, eight hundred seventy-two".