25436427408 has 120 divisors (see below), whose sum is σ = 84369475008. Its totient is φ = 7267542912.

The previous prime is 25436427391. The next prime is 25436427413. The reversal of 25436427408 is 80472463452.

It is a happy number.

25436427408 is a `hidden beast` number, since 2 + 543 + 64 + 2 + 7 + 40 + 8 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 440091 + ... + 494522.

Almost surely, 2^25436427408 is an apocalyptic number.

25436427408 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25436427408 is an abundant number, since it is smaller than the sum of its proper divisors (58933047600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25436427408 is an equidigital number, since it uses as much as digits as its factorization.

25436427408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934643 (or 934625 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 45.

The spelling of 25436427408 in words is "twenty-five billion, four hundred thirty-six million, four hundred twenty-seven thousand, four hundred eight".