71745564 has 48 divisors (see below), whose sum is σ = 183246336. Its totient is φ = 21667200.

The previous prime is 71745551. The next prime is 71745581. The reversal of 71745564 is 46554717.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

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, 47704 + ... + 49184.

It is an arithmetic number, because the mean of its divisors is an integer number (3817632).

Almost surely, 2^71745564 is an apocalyptic number.

It is an amenable number.

71745564 is an abundant number, since it is smaller than the sum of its proper divisors (111500772).

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

71745564 is a wasteful number, since it uses less digits than its factorization.

71745564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866 (or 1864 counting only the distinct ones).

The product of its digits is 117600, while the sum is 39.

The square root of 71745564 is about 8470.2753202006. The cubic root of 71745564 is about 415.5261415924.

The spelling of 71745564 in words is "seventy-one million, seven hundred forty-five thousand, five hundred sixty-four".