2565505454 has 4 divisors (see below), whose sum is σ = 3848258184. Its totient is φ = 1282752726.

The previous prime is 2565505421. The next prime is 2565505477. The reversal of 2565505454 is 4545055652.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×2565505454² = 13163636469007492232, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641376362 + ... + 641376365.

It is an arithmetic number, because the mean of its divisors is an integer number (962064546).

Almost surely, 2^2565505454 is an apocalyptic number.

2565505454 is a deficient number, since it is larger than the sum of its proper divisors (1282752730).

2565505454 is a wasteful number, since it uses less digits than its factorization.

2565505454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282752729.

The product of its (nonzero) digits is 600000, while the sum is 41.

The square root of 2565505454 is about 50650.8188877534. The cubic root of 2565505454 is about 1368.9607003982.

The spelling of 2565505454 in words is "two billion, five hundred sixty-five million, five hundred five thousand, four hundred fifty-four".