25693894465 has 16 divisors (see below), whose sum is σ = 32477987520. Its totient is φ = 19459742400.

The previous prime is 25693894459. The next prime is 25693894477. The reversal of 25693894465 is 56449839652.

It is not a de Polignac number, because 25693894465 - 2²⁵ = 25660340033 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44647 + ... + 231043.

It is an arithmetic number, because the mean of its divisors is an integer number (2029874220).

Almost surely, 2^25693894465 is an apocalyptic number.

It is an amenable number.

25693894465 is a deficient number, since it is larger than the sum of its proper divisors (6784093055).

25693894465 is a wasteful number, since it uses less digits than its factorization.

25693894465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187872.

The product of its digits is 55987200, while the sum is 61.

The spelling of 25693894465 in words is "twenty-five billion, six hundred ninety-three million, eight hundred ninety-four thousand, four hundred sixty-five".