2009979564 has 48 divisors (see below), whose sum is σ = 5100062688. Its totient is φ = 613536768.

The previous prime is 2009979553. The next prime is 2009979577. The reversal of 2009979564 is 4659799002.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (51).

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, 125599 + ... + 140694.

It is an arithmetic number, because the mean of its divisors is an integer number (106251306).

Almost surely, 2^2009979564 is an apocalyptic number.

It is an amenable number.

2009979564 is an abundant number, since it is smaller than the sum of its proper divisors (3090083124).

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

2009979564 is a wasteful number, since it uses less digits than its factorization.

2009979564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266354 (or 266352 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 51.

The square root of 2009979564 is about 44832.7956299850. The cubic root of 2009979564 is about 1262.0131511594.

The spelling of 2009979564 in words is "two billion, nine million, nine hundred seventy-nine thousand, five hundred sixty-four".