71983154688 has 80 divisors (see below), whose sum is σ = 197953806336. Its totient is φ = 23220357120.

The previous prime is 71983154623. The next prime is 71983154707. The reversal of 71983154688 is 88645138917.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 708256 + ... + 803487.

Almost surely, 2^71983154688 is an apocalyptic number.

It is an amenable number.

71983154688 is an abundant number, since it is smaller than the sum of its proper divisors (125970651648).

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

71983154688 is a wasteful number, since it uses less digits than its factorization.

71983154688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1511795 (or 1511779 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 60.

The spelling of 71983154688 in words is "seventy-one billion, nine hundred eighty-three million, one hundred fifty-four thousand, six hundred eighty-eight".