25645251373 has 12 divisors (see below), whose sum is σ = 29957065920. Its totient is φ = 21889660632.

The previous prime is 25645251353. The next prime is 25645251389. The reversal of 25645251373 is 37315254652.

It is a happy number.

It is not a de Polignac number, because 25645251373 - 2⁵ = 25645251341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25645251353) 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, 1083211 + ... + 1106632.

It is an arithmetic number, because the mean of its divisors is an integer number (2496422160).

Almost surely, 2^25645251373 is an apocalyptic number.

It is an amenable number.

25645251373 is a deficient number, since it is larger than the sum of its proper divisors (4311814547).

25645251373 is a wasteful number, since it uses less digits than its factorization.

25645251373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2190096 (or 2190089 counting only the distinct ones).

The product of its digits is 756000, while the sum is 43.

The spelling of 25645251373 in words is "twenty-five billion, six hundred forty-five million, two hundred fifty-one thousand, three hundred seventy-three".