2565264403 has 8 divisors (see below), whose sum is σ = 2764879488. Its totient is φ = 2365976064.

The previous prime is 2565264367. The next prime is 2565264409. The reversal of 2565264403 is 3044625652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2565264403 - 2¹⁷ = 2565133331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2565264409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65251 + ... + 96892.

It is an arithmetic number, because the mean of its divisors is an integer number (345609936).

Almost surely, 2^2565264403 is an apocalyptic number.

2565264403 is a deficient number, since it is larger than the sum of its proper divisors (199615085).

2565264403 is a wasteful number, since it uses less digits than its factorization.

2565264403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163373.

The product of its (nonzero) digits is 172800, while the sum is 37.

The square root of 2565264403 is about 50648.4392948095. The cubic root of 2565264403 is about 1368.9178238985.

The spelling of 2565264403 in words is "two billion, five hundred sixty-five million, two hundred sixty-four thousand, four hundred three".