25263887776249 has 2 divisors, whose sum is σ = 25263887776250. Its totient is φ = 25263887776248.

The previous prime is 25263887776243. The next prime is 25263887776277. The reversal of 25263887776249 is 94267778836252.

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., 16901611878649 + 8362275897600 = 4111157^2 + 2891760^2 .

It is a cyclic number.

It is not a de Polignac number, because 25263887776249 - 2¹⁷ = 25263887645177 is a prime.

It is not a weakly prime, because it can be changed into another prime (25263887776243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12631943888124 + 12631943888125.

It is an arithmetic number, because the mean of its divisors is an integer number (12631943888125).

Almost surely, 2^{25263887776249} is an apocalyptic number.

It is an amenable number.

25263887776249 is a deficient number, since it is larger than the sum of its proper divisors (1).

25263887776249 is an equidigital number, since it uses as much as digits as its factorization.

25263887776249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3413975040, while the sum is 76.

The spelling of 25263887776249 in words is "twenty-five trillion, two hundred sixty-three billion, eight hundred eighty-seven million, seven hundred seventy-six thousand, two hundred forty-nine".