71957012208 has 80 divisors (see below), whose sum is σ = 199519970976. Its totient is φ = 22265487360.

The previous prime is 71957012189. The next prime is 71957012213. The reversal of 71957012208 is 80221075917.

It is a super-2 number, since 2×71957012208² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71957012208.

It is a congruent 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, 544423 + ... + 663558.

Almost surely, 2^71957012208 is an apocalyptic number.

It is an amenable number.

71957012208 is an abundant number, since it is smaller than the sum of its proper divisors (127562958768).

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

71957012208 is a wasteful number, since it uses less digits than its factorization.

71957012208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208082 (or 1208076 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 42.

The spelling of 71957012208 in words is "seventy-one billion, nine hundred fifty-seven million, twelve thousand, two hundred eight".