25256743603 has 24 divisors (see below), whose sum is σ = 31893972000. Its totient is φ = 19983311712.

The previous prime is 25256743591. The next prime is 25256743607. The reversal of 25256743603 is 30634765252.

It is not a de Polignac number, because 25256743603 - 2⁵ = 25256743571 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25256743603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25256743607) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 159888 + ... + 275821.

It is an arithmetic number, because the mean of its divisors is an integer number (1328915500).

Almost surely, 2^25256743603 is an apocalyptic number.

25256743603 is a deficient number, since it is larger than the sum of its proper divisors (6637228397).

25256743603 is an equidigital number, since it uses as much as digits as its factorization.

25256743603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435756 (or 435729 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 43.

The spelling of 25256743603 in words is "twenty-five billion, two hundred fifty-six million, seven hundred forty-three thousand, six hundred three".