71057047656 has 64 divisors (see below), whose sum is σ = 203067924480. Its totient is φ = 20297234880.

The previous prime is 71057047631. The next prime is 71057047657. The reversal of 71057047656 is 65674075017.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (71057047657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 699541 + ... + 794651.

It is an arithmetic number, because the mean of its divisors is an integer number (3172936320).

Almost surely, 2^71057047656 is an apocalyptic number.

It is an amenable number.

71057047656 is an abundant number, since it is smaller than the sum of its proper divisors (132010876824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71057047656 is a wasteful number, since it uses less digits than its factorization.

71057047656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99574 (or 99570 counting only the distinct ones).

The product of its (nonzero) digits is 1234800, while the sum is 48.

The spelling of 71057047656 in words is "seventy-one billion, fifty-seven million, forty-seven thousand, six hundred fifty-six".