25366094491 has 2 divisors, whose sum is σ = 25366094492. Its totient is φ = 25366094490.

The previous prime is 25366094483. The next prime is 25366094557. The reversal of 25366094491 is 19449066352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25366094491 - 2³ = 25366094483 is a prime.

It is not a weakly prime, because it can be changed into another prime (25366094401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12683047245 + 12683047246.

It is an arithmetic number, because the mean of its divisors is an integer number (12683047246).

Almost surely, 2^25366094491 is an apocalyptic number.

25366094491 is a deficient number, since it is larger than the sum of its proper divisors (1).

25366094491 is an equidigital number, since it uses as much as digits as its factorization.

25366094491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 49.

The spelling of 25366094491 in words is "twenty-five billion, three hundred sixty-six million, ninety-four thousand, four hundred ninety-one".