25910400961 has 16 divisors (see below), whose sum is σ = 27821491200. Its totient is φ = 24043189248.

The previous prime is 25910400949. The next prime is 25910400983. The reversal of 25910400961 is 16900401952.

It is a cyclic number.

It is not a de Polignac number, because 25910400961 - 2¹³ = 25910392769 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 25910400961.

It is not an unprimeable number, because it can be changed into a prime (25910400911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 952201 + ... + 979033.

It is an arithmetic number, because the mean of its divisors is an integer number (1738843200).

Almost surely, 2^25910400961 is an apocalyptic number.

It is an amenable number.

25910400961 is a deficient number, since it is larger than the sum of its proper divisors (1911090239).

25910400961 is a wasteful number, since it uses less digits than its factorization.

25910400961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27648.

The product of its (nonzero) digits is 19440, while the sum is 37.

Subtracting from 25910400961 its reverse (16900401952), we obtain a palindrome (9009999009).

The spelling of 25910400961 in words is "twenty-five billion, nine hundred ten million, four hundred thousand, nine hundred sixty-one".