71855573872 has 10 divisors (see below), whose sum is σ = 139220174408. Its totient is φ = 35927786928.

The previous prime is 71855573819. The next prime is 71855573891. The reversal of 71855573872 is 27837555817.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2245486668 + ... + 2245486699.

Almost surely, 2^71855573872 is an apocalyptic number.

It is an amenable number.

71855573872 is a deficient number, since it is larger than the sum of its proper divisors (67364600536).

71855573872 is a wasteful number, since it uses less digits than its factorization.

71855573872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4490973375 (or 4490973369 counting only the distinct ones).

The product of its digits is 16464000, while the sum is 58.

The spelling of 71855573872 in words is "seventy-one billion, eight hundred fifty-five million, five hundred seventy-three thousand, eight hundred seventy-two".