2564642455 has 16 divisors (see below), whose sum is σ = 3162073824. Its totient is φ = 1995678720.

The previous prime is 2564642453. The next prime is 2564642471. The reversal of 2564642455 is 5542464652.

It is a happy number.

It is not a de Polignac number, because 2564642455 - 2¹ = 2564642453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564642453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50524 + ... + 87646.

It is an arithmetic number, because the mean of its divisors is an integer number (197629614).

Almost surely, 2^2564642455 is an apocalyptic number.

2564642455 is a deficient number, since it is larger than the sum of its proper divisors (597431369).

2564642455 is a wasteful number, since it uses less digits than its factorization.

2564642455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37506.

The product of its digits is 1152000, while the sum is 43.

The square root of 2564642455 is about 50642.2990690589. The cubic root of 2564642455 is about 1368.8071836440.

The spelling of 2564642455 in words is "two billion, five hundred sixty-four million, six hundred forty-two thousand, four hundred fifty-five".