25266253669 has 2 divisors, whose sum is σ = 25266253670. Its totient is φ = 25266253668.

The previous prime is 25266253643. The next prime is 25266253673. The reversal of 25266253669 is 96635266252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16502485444 + 8763768225 = 128462^2 + 93615^2 .

It is a cyclic number.

It is not a de Polignac number, because 25266253669 - 2¹⁷ = 25266122597 is a prime.

It is a super-2 number, since 2×25266253669² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25266253679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12633126834 + 12633126835.

It is an arithmetic number, because the mean of its divisors is an integer number (12633126835).

Almost surely, 2^25266253669 is an apocalyptic number.

It is an amenable number.

25266253669 is a deficient number, since it is larger than the sum of its proper divisors (1).

25266253669 is an equidigital number, since it uses as much as digits as its factorization.

25266253669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6998400, while the sum is 52.

The spelling of 25266253669 in words is "twenty-five billion, two hundred sixty-six million, two hundred fifty-three thousand, six hundred sixty-nine".