25266374369 has 2 divisors, whose sum is σ = 25266374370. Its totient is φ = 25266374368.

The previous prime is 25266374333. The next prime is 25266374473. The reversal of 25266374369 is 96347366252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16419090769 + 8847283600 = 128137^2 + 94060^2 .

It is a cyclic number.

It is not a de Polignac number, because 25266374369 - 2⁸ = 25266374113 is a prime.

It is a super-2 number, since 2×25266374369² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25266374369.

It is not a weakly prime, because it can be changed into another prime (25266374269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12633187184 + 12633187185.

It is an arithmetic number, because the mean of its divisors is an integer number (12633187185).

Almost surely, 2^25266374369 is an apocalyptic number.

It is an amenable number.

25266374369 is a deficient number, since it is larger than the sum of its proper divisors (1).

25266374369 is an equidigital number, since it uses as much as digits as its factorization.

25266374369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9797760, while the sum is 53.

The spelling of 25266374369 in words is "twenty-five billion, two hundred sixty-six million, three hundred seventy-four thousand, three hundred sixty-nine".