71121713572 has 48 divisors (see below), whose sum is σ = 156075558912. Its totient is φ = 27605185920.

The previous prime is 71121713567. The next prime is 71121713633. The reversal of 71121713572 is 27531712117.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1824004 + ... + 1862587.

It is an arithmetic number, because the mean of its divisors is an integer number (3251574144).

Almost surely, 2^71121713572 is an apocalyptic number.

It is an amenable number.

71121713572 is an abundant number, since it is smaller than the sum of its proper divisors (84953845340).

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

71121713572 is a wasteful number, since it uses less digits than its factorization.

71121713572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3686668 (or 3686666 counting only the distinct ones).

The product of its digits is 20580, while the sum is 37.

The spelling of 71121713572 in words is "seventy-one billion, one hundred twenty-one million, seven hundred thirteen thousand, five hundred seventy-two".