25564923 has 16 divisors (see below), whose sum is σ = 40102560. Its totient is φ = 16040448.

The previous prime is 25564907. The next prime is 25564939. The reversal of 25564923 is 32946552.

25564923 is a `hidden beast` number, since 2 + 5 + 5 + 649 + 2 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (25564907) and next prime (25564939).

It is not a de Polignac number, because 25564923 - 2⁴ = 25564907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25564963) 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, 27390 + ... + 28307.

It is an arithmetic number, because the mean of its divisors is an integer number (2506410).

Almost surely, 2^25564923 is an apocalyptic number.

25564923 is a deficient number, since it is larger than the sum of its proper divisors (14537637).

25564923 is a wasteful number, since it uses less digits than its factorization.

25564923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55723 (or 55717 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 25564923 is about 5056.1767176395. The cubic root of 25564923 is about 294.5878492257.

The spelling of 25564923 in words is "twenty-five million, five hundred sixty-four thousand, nine hundred twenty-three".