25636242553 has 2 divisors, whose sum is σ = 25636242554. Its totient is φ = 25636242552.

The previous prime is 25636242547. The next prime is 25636242601. The reversal of 25636242553 is 35524263652.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22384049769 + 3252192784 = 149613^2 + 57028^2 .

It is a cyclic number.

It is not a de Polignac number, because 25636242553 - 2⁹ = 25636242041 is a prime.

It is a super-3 number, since 3×25636242553³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (25636242053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12818121276 + 12818121277.

It is an arithmetic number, because the mean of its divisors is an integer number (12818121277).

Almost surely, 2^25636242553 is an apocalyptic number.

It is an amenable number.

25636242553 is a deficient number, since it is larger than the sum of its proper divisors (1).

25636242553 is an equidigital number, since it uses as much as digits as its factorization.

25636242553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296000, while the sum is 43.

The spelling of 25636242553 in words is "twenty-five billion, six hundred thirty-six million, two hundred forty-two thousand, five hundred fifty-three".