71565164 has 12 divisors (see below), whose sum is σ = 136624488. Its totient is φ = 32529600.

The previous prime is 71565133. The next prime is 71565181. The reversal of 71565164 is 46156517.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 813197 + ... + 813284.

It is an arithmetic number, because the mean of its divisors is an integer number (11385374).

Almost surely, 2^71565164 is an apocalyptic number.

It is an amenable number.

71565164 is a deficient number, since it is larger than the sum of its proper divisors (65059324).

71565164 is a wasteful number, since it uses less digits than its factorization.

71565164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626496 (or 1626494 counting only the distinct ones).

The product of its digits is 25200, while the sum is 35.

The square root of 71565164 is about 8459.6196131977. The cubic root of 71565164 is about 415.1775772680.

The spelling of 71565164 in words is "seventy-one million, five hundred sixty-five thousand, one hundred sixty-four".