2564540453 has 4 divisors (see below), whose sum is σ = 2589439008. Its totient is φ = 2539641900.

The previous prime is 2564540449. The next prime is 2564540501. The reversal of 2564540453 is 3540454652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2564540453 - 2² = 2564540449 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 (2564540413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12449123 + ... + 12449328.

It is an arithmetic number, because the mean of its divisors is an integer number (647359752).

Almost surely, 2^2564540453 is an apocalyptic number.

It is an amenable number.

2564540453 is a deficient number, since it is larger than the sum of its proper divisors (24898555).

2564540453 is a wasteful number, since it uses less digits than its factorization.

2564540453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24898554.

The product of its (nonzero) digits is 288000, while the sum is 38.

The square root of 2564540453 is about 50641.2919760150. The cubic root of 2564540453 is about 1368.7890364853.

The spelling of 2564540453 in words is "two billion, five hundred sixty-four million, five hundred forty thousand, four hundred fifty-three".