25653442625 has 8 divisors (see below), whose sum is σ = 32015496552. Its totient is φ = 20522754000.

The previous prime is 25653442613. The next prime is 25653442631. The reversal of 25653442625 is 52624435652.

It can be written as a sum of positive squares in 4 ways, for example, as 6542868544 + 19110574081 = 80888^2 + 138241^2 .

It is not a de Polignac number, because 25653442625 - 2¹² = 25653438529 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102613646 + ... + 102613895.

It is an arithmetic number, because the mean of its divisors is an integer number (4001937069).

Almost surely, 2^25653442625 is an apocalyptic number.

25653442625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25653442625 is a deficient number, since it is larger than the sum of its proper divisors (6362053927).

25653442625 is an equidigital number, since it uses as much as digits as its factorization.

25653442625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205227556 (or 205227546 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 44.

The spelling of 25653442625 in words is "twenty-five billion, six hundred fifty-three million, four hundred forty-two thousand, six hundred twenty-five".