25941202561 has 4 divisors (see below), whose sum is σ = 25948594624. Its totient is φ = 25933810500.

The previous prime is 25941202549. The next prime is 25941202591. The reversal of 25941202561 is 16520214952.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25941202561 - 2³¹ = 23793718913 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 25941202561.

It is not an unprimeable number, because it can be changed into a prime (25941202591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3690765 + ... + 3697786.

It is an arithmetic number, because the mean of its divisors is an integer number (6487148656).

Almost surely, 2^25941202561 is an apocalyptic number.

It is an amenable number.

25941202561 is a deficient number, since it is larger than the sum of its proper divisors (7392063).

25941202561 is an equidigital number, since it uses as much as digits as its factorization.

25941202561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7392062.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 25941202561 in words is "twenty-five billion, nine hundred forty-one million, two hundred two thousand, five hundred sixty-one".