2564983578 has 16 divisors (see below), whose sum is σ = 5141874816. Its totient is φ = 853009920.

The previous prime is 2564983469. The next prime is 2564983591. The reversal of 2564983578 is 8753894652.

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, 493351 + ... + 498522.

It is an arithmetic number, because the mean of its divisors is an integer number (321367176).

Almost surely, 2^2564983578 is an apocalyptic number.

2564983578 is an abundant number, since it is smaller than the sum of its proper divisors (2576891238).

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

2564983578 is a wasteful number, since it uses less digits than its factorization.

2564983578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992309.

The product of its digits is 14515200, while the sum is 57.

The square root of 2564983578 is about 50645.6669222551. Note that the first 3 decimals coincide. The cubic root of 2564983578 is about 1368.8678692848.

The spelling of 2564983578 in words is "two billion, five hundred sixty-four million, nine hundred eighty-three thousand, five hundred seventy-eight".