25408632425 has 24 divisors (see below), whose sum is σ = 34483022112. Its totient is φ = 18418752000.

The previous prime is 25408632413. The next prime is 25408632479. The reversal of 25408632425 is 52423680452.

It is a happy number.

It is not a de Polignac number, because 25408632425 - 2⁴ = 25408632409 is a prime.

It is a super-2 number, since 2×25408632425² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66056 + ... + 234905.

It is an arithmetic number, because the mean of its divisors is an integer number (1436792588).

Almost surely, 2^25408632425 is an apocalyptic number.

25408632425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25408632425 is a deficient number, since it is larger than the sum of its proper divisors (9074389687).

25408632425 is a wasteful number, since it uses less digits than its factorization.

25408632425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301289 (or 301284 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 41.

The spelling of 25408632425 in words is "twenty-five billion, four hundred eight million, six hundred thirty-two thousand, four hundred twenty-five".