25145634625 has 16 divisors (see below), whose sum is σ = 31686445440. Its totient is φ = 19921191600.

The previous prime is 25145634571. The next prime is 25145634629. The reversal of 25145634625 is 52643654152.

It is not a de Polignac number, because 25145634625 - 2⁷ = 25145634497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25145634629) 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, 963655 + ... + 989404.

It is an arithmetic number, because the mean of its divisors is an integer number (1980402840).

Almost surely, 2^25145634625 is an apocalyptic number.

25145634625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25145634625 is a deficient number, since it is larger than the sum of its proper divisors (6540810815).

25145634625 is a wasteful number, since it uses less digits than its factorization.

25145634625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1953177 (or 1953167 counting only the distinct ones).

The product of its digits is 864000, while the sum is 43.

The spelling of 25145634625 in words is "twenty-five billion, one hundred forty-five million, six hundred thirty-four thousand, six hundred twenty-five".