25531541625 has 32 divisors (see below), whose sum is σ = 42503760000. Its totient is φ = 13610644800.

The previous prime is 25531541617. The next prime is 25531541639. The reversal of 25531541625 is 52614513552.

It is not a de Polignac number, because 25531541625 - 2³ = 25531541617 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 881626 + ... + 910124.

It is an arithmetic number, because the mean of its divisors is an integer number (1328242500).

Almost surely, 2^25531541625 is an apocalyptic number.

25531541625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25531541625 is a deficient number, since it is larger than the sum of its proper divisors (16972218375).

25531541625 is a wasteful number, since it uses less digits than its factorization.

25531541625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30906 (or 30896 counting only the distinct ones).

The product of its digits is 180000, while the sum is 39.

The spelling of 25531541625 in words is "twenty-five billion, five hundred thirty-one million, five hundred forty-one thousand, six hundred twenty-five".