71591984930 has 16 divisors (see below), whose sum is σ = 128880604224. Its totient is φ = 28633453680.

The previous prime is 71591984899. The next prime is 71591984941. The reversal of 71591984930 is 3948919517.

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, 326576 + ... + 499835.

It is an arithmetic number, because the mean of its divisors is an integer number (8055037764).

Almost surely, 2^71591984930 is an apocalyptic number.

71591984930 is a deficient number, since it is larger than the sum of its proper divisors (57288619294).

71591984930 is a wasteful number, since it uses less digits than its factorization.

71591984930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835081.

The product of its (nonzero) digits is 2449440, while the sum is 56.

The spelling of 71591984930 in words is "seventy-one billion, five hundred ninety-one million, nine hundred eighty-four thousand, nine hundred thirty".