2566438725 has 24 divisors (see below), whose sum is σ = 4249817280. Its totient is φ = 1366625920.

The previous prime is 2566438717. The next prime is 2566438741. The reversal of 2566438725 is 5278346652.

It is not a de Polignac number, because 2566438725 - 2³ = 2566438717 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22081 + ... + 74969.

It is an arithmetic number, because the mean of its divisors is an integer number (177075720).

Almost surely, 2^2566438725 is an apocalyptic number.

2566438725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2566438725 is a deficient number, since it is larger than the sum of its proper divisors (1683378555).

2566438725 is a wasteful number, since it uses less digits than its factorization.

2566438725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53549 (or 53544 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 48.

The square root of 2566438725 is about 50660.0308428647. The cubic root of 2566438725 is about 1369.1266789229.

The spelling of 2566438725 in words is "two billion, five hundred sixty-six million, four hundred thirty-eight thousand, seven hundred twenty-five".