25511333417261 has 2 divisors, whose sum is σ = 25511333417262. Its totient is φ = 25511333417260.

The previous prime is 25511333417239. The next prime is 25511333417263. The reversal of 25511333417261 is 16271433311552.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25402759213225 + 108574204036 = 5040115^2 + 329506^2 .

It is a cyclic number.

It is not a de Polignac number, because 25511333417261 - 2¹⁸ = 25511333155117 is a prime.

Together with 25511333417263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25511333417263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12755666708630 + 12755666708631.

It is an arithmetic number, because the mean of its divisors is an integer number (12755666708631).

Almost surely, 2^{25511333417261} is an apocalyptic number.

It is an amenable number.

25511333417261 is a deficient number, since it is larger than the sum of its proper divisors (1).

25511333417261 is an equidigital number, since it uses as much as digits as its factorization.

25511333417261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 44.

The spelling of 25511333417261 in words is "twenty-five trillion, five hundred eleven billion, three hundred thirty-three million, four hundred seventeen thousand, two hundred sixty-one".