25465856451 has 16 divisors (see below), whose sum is σ = 39630756864. Its totient is φ = 14242302144.

The previous prime is 25465856443. The next prime is 25465856453. The reversal of 25465856451 is 15465856452.

It is not a de Polignac number, because 25465856451 - 2³ = 25465856443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25465856394 and 25465856403.

It is not an unprimeable number, because it can be changed into a prime (25465856453) 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, 12899650 + ... + 12901623.

It is an arithmetic number, because the mean of its divisors is an integer number (2476922304).

Almost surely, 2^25465856451 is an apocalyptic number.

25465856451 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25465856451 is a deficient number, since it is larger than the sum of its proper divisors (14164900413).

25465856451 is a wasteful number, since it uses less digits than its factorization.

25465856451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25801330.

The product of its digits is 5760000, while the sum is 51.

Subtracting from 25465856451 its reverse (15465856452), we obtain a palindrome (9999999999).

The spelling of 25465856451 in words is "twenty-five billion, four hundred sixty-five million, eight hundred fifty-six thousand, four hundred fifty-one".