71975661394 has 32 divisors (see below), whose sum is σ = 133448515200. Its totient is φ = 28351665792.

The previous prime is 71975661383. The next prime is 71975661449. The reversal of 71975661394 is 49316657917.

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, 806244 + ... + 891055.

It is an arithmetic number, because the mean of its divisors is an integer number (4170266100).

Almost surely, 2^71975661394 is an apocalyptic number.

71975661394 is a deficient number, since it is larger than the sum of its proper divisors (61472853806).

71975661394 is a wasteful number, since it uses less digits than its factorization.

71975661394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1697554.

The product of its digits is 8573040, while the sum is 58.

The spelling of 71975661394 in words is "seventy-one billion, nine hundred seventy-five million, six hundred sixty-one thousand, three hundred ninety-four".