25426002563261 has 2 divisors, whose sum is σ = 25426002563262. Its totient is φ = 25426002563260.

The previous prime is 25426002563239. The next prime is 25426002563267. The reversal of 25426002563261 is 16236520062452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22578747924100 + 2847254639161 = 4751710^2 + 1687381^2 .

It is a cyclic number.

It is not a de Polignac number, because 25426002563261 - 2²² = 25425998368957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25426002563267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12713001281630 + 12713001281631.

It is an arithmetic number, because the mean of its divisors is an integer number (12713001281631).

Almost surely, 2^{25426002563261} is an apocalyptic number.

It is an amenable number.

25426002563261 is a deficient number, since it is larger than the sum of its proper divisors (1).

25426002563261 is an equidigital number, since it uses as much as digits as its factorization.

25426002563261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 25426002563261 in words is "twenty-five trillion, four hundred twenty-six billion, two million, five hundred sixty-three thousand, two hundred sixty-one".