25436044625 has 8 divisors (see below), whose sum is σ = 31744183848. Its totient is φ = 20348835600.

The previous prime is 25436044607. The next prime is 25436044687. The reversal of 25436044625 is 52644063452.

It can be written as a sum of positive squares in 4 ways, for example, as 376204816 + 25059839809 = 19396^2 + 158303^2 .

It is not a de Polignac number, because 25436044625 - 2⁸ = 25436044369 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 101744054 + ... + 101744303.

It is an arithmetic number, because the mean of its divisors is an integer number (3968022981).

Almost surely, 2^25436044625 is an apocalyptic number.

25436044625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25436044625 is a deficient number, since it is larger than the sum of its proper divisors (6308139223).

25436044625 is an equidigital number, since it uses as much as digits as its factorization.

25436044625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203488372 (or 203488362 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 41.

The spelling of 25436044625 in words is "twenty-five billion, four hundred thirty-six million, forty-four thousand, six hundred twenty-five".