25564492323 has 32 divisors (see below), whose sum is σ = 39159832320. Its totient is φ = 16471840320.

The previous prime is 25564492319. The next prime is 25564492363. The reversal of 25564492323 is 32329446552.

25564492323 is a `hidden beast` number, since 2 + 5 + 564 + 49 + 23 + 23 = 666.

It is not a de Polignac number, because 25564492323 - 2² = 25564492319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25564492363) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10536 + ... + 226362.

It is an arithmetic number, because the mean of its divisors is an integer number (1223744760).

Almost surely, 2^25564492323 is an apocalyptic number.

25564492323 is a deficient number, since it is larger than the sum of its proper divisors (13595339997).

25564492323 is a wasteful number, since it uses less digits than its factorization.

25564492323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215984 (or 215978 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 45.

The spelling of 25564492323 in words is "twenty-five billion, five hundred sixty-four million, four hundred ninety-two thousand, three hundred twenty-three".