74865564 has 18 divisors (see below), whose sum is σ = 189243600. Its totient is φ = 24955176.

The previous prime is 74865563. The next prime is 74865587. The reversal of 74865564 is 46556847.

74865564 is a `hidden beast` number, since 7 + 4 + 86 + 5 + 564 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74865563) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1039764 + ... + 1039835.

Almost surely, 2^74865564 is an apocalyptic number.

It is an amenable number.

74865564 is an abundant number, since it is smaller than the sum of its proper divisors (114378036).

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

74865564 is a wasteful number, since it uses less digits than its factorization.

74865564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079609 (or 2079604 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The square root of 74865564 is about 8652.4888904869. The cubic root of 74865564 is about 421.4642092514.

The spelling of 74865564 in words is "seventy-four million, eight hundred sixty-five thousand, five hundred sixty-four".