25355252321 has 12 divisors (see below), whose sum is σ = 29562096960. Its totient is φ = 21683549160.

The previous prime is 25355252287. The next prime is 25355252347. The reversal of 25355252321 is 12325255352.

It is not a de Polignac number, because 25355252321 - 2⁶ = 25355252257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25355252381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 567845 + ... + 610866.

It is an arithmetic number, because the mean of its divisors is an integer number (2463508080).

Almost surely, 2^25355252321 is an apocalyptic number.

It is an amenable number.

25355252321 is a deficient number, since it is larger than the sum of its proper divisors (4206844639).

25355252321 is a wasteful number, since it uses less digits than its factorization.

25355252321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179164 (or 1179157 counting only the distinct ones).

The product of its digits is 90000, while the sum is 35.

The spelling of 25355252321 in words is "twenty-five billion, three hundred fifty-five million, two hundred fifty-two thousand, three hundred twenty-one".