25901039845 has 64 divisors (see below), whose sum is σ = 33550096320. Its totient is φ = 19161612288.

The previous prime is 25901039831. The next prime is 25901039861. The reversal of 25901039845 is 54893010952.

It is a Cunningham number, because it is equal to 160938²+1.

It can be written as a sum of positive squares in 32 ways, for example, as 12592879524 + 13308160321 = 112218^2 + 115361^2 .

It is a cyclic number.

It is not a de Polignac number, because 25901039845 - 2²³ = 25892651237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25901039795 and 25901039804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 76857517 + ... + 76857853.

It is an arithmetic number, because the mean of its divisors is an integer number (524220255).

Almost surely, 2^25901039845 is an apocalyptic number.

It is an amenable number.

25901039845 is a deficient number, since it is larger than the sum of its proper divisors (7649056475).

25901039845 is a wasteful number, since it uses less digits than its factorization.

25901039845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634.

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 25901039845 in words is "twenty-five billion, nine hundred one million, thirty-nine thousand, eight hundred forty-five".