2564387487 has 24 divisors (see below), whose sum is σ = 3852845568. Its totient is φ = 1641790800.

The previous prime is 2564387471. The next prime is 2564387521. The reversal of 2564387487 is 7847834652.

2564387487 is a `hidden beast` number, since 2 + 564 + 3 + 8 + 74 + 8 + 7 = 666.

It is not a de Polignac number, because 2564387487 - 2⁴ = 2564387471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564387417) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1468 + ... + 71630.

It is an arithmetic number, because the mean of its divisors is an integer number (160535232).

Almost surely, 2^2564387487 is an apocalyptic number.

2564387487 is a deficient number, since it is larger than the sum of its proper divisors (1288458081).

2564387487 is a wasteful number, since it uses less digits than its factorization.

2564387487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70331 (or 70328 counting only the distinct ones).

The product of its digits is 9031680, while the sum is 54.

The square root of 2564387487 is about 50639.7816642213. The cubic root of 2564387487 is about 1368.7618214279.

The spelling of 2564387487 in words is "two billion, five hundred sixty-four million, three hundred eighty-seven thousand, four hundred eighty-seven".