25458621225 has 24 divisors (see below), whose sum is σ = 43921659072. Its totient is φ = 12987585600.

The previous prime is 25458621187. The next prime is 25458621259. The reversal of 25458621225 is 52212685452.

It is a happy number.

It is not a de Polignac number, because 25458621225 - 2⁶ = 25458621161 is a prime.

It is a Curzon number.

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, 7377586 + ... + 7381035.

It is an arithmetic number, because the mean of its divisors is an integer number (1830069128).

Almost surely, 2^25458621225 is an apocalyptic number.

25458621225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25458621225 is a deficient number, since it is larger than the sum of its proper divisors (18463037847).

25458621225 is a wasteful number, since it uses less digits than its factorization.

25458621225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14758657 (or 14758652 counting only the distinct ones).

The product of its digits is 384000, while the sum is 42.

The spelling of 25458621225 in words is "twenty-five billion, four hundred fifty-eight million, six hundred twenty-one thousand, two hundred twenty-five".