99742564 has 24 divisors (see below), whose sum is σ = 178084088. Its totient is φ = 48867840.

The previous prime is 99742541. The next prime is 99742613. The reversal of 99742564 is 46524799.

It can be written as a sum of positive squares in 4 ways, for example, as 9872164 + 89870400 = 3142^2 + 9480^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81622 + ... + 82834.

Almost surely, 2^99742564 is an apocalyptic number.

It is an amenable number.

99742564 is a deficient number, since it is larger than the sum of its proper divisors (78341524).

99742564 is a wasteful number, since it uses less digits than its factorization.

99742564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1615 (or 1613 counting only the distinct ones).

The product of its digits is 544320, while the sum is 46.

The square root of 99742564 is about 9987.1199051578. The cubic root of 99742564 is about 463.7602370580.

The spelling of 99742564 in words is "ninety-nine million, seven hundred forty-two thousand, five hundred sixty-four".