75999564 has 36 divisors (see below), whose sum is σ = 196201824. Its totient is φ = 24793632.

The previous prime is 75999551. The next prime is 75999589. The reversal of 75999564 is 46599957.

75999564 is a `hidden beast` number, since 75 + 9 + 9 + 9 + 564 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 75999564.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20767 + ... + 24150.

Almost surely, 2^75999564 is an apocalyptic number.

It is an amenable number.

75999564 is an abundant number, since it is smaller than the sum of its proper divisors (120202260).

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

75999564 is a wasteful number, since it uses less digits than its factorization.

75999564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44974 (or 44969 counting only the distinct ones).

The product of its digits is 3061800, while the sum is 54.

The square root of 75999564 is about 8717.7728807305. The cubic root of 75999564 is about 423.5815484156.

The spelling of 75999564 in words is "seventy-five million, nine hundred ninety-nine thousand, five hundred sixty-four".