25561346159 has 2 divisors, whose sum is σ = 25561346160. Its totient is φ = 25561346158.

The previous prime is 25561346137. The next prime is 25561346177. The reversal of 25561346159 is 95164316552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25561346159 - 2⁸ = 25561345903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25561346189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12780673079 + 12780673080.

It is an arithmetic number, because the mean of its divisors is an integer number (12780673080).

Almost surely, 2^25561346159 is an apocalyptic number.

25561346159 is a deficient number, since it is larger than the sum of its proper divisors (1).

25561346159 is an equidigital number, since it uses as much as digits as its factorization.

25561346159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972000, while the sum is 47.

The spelling of 25561346159 in words is "twenty-five billion, five hundred sixty-one million, three hundred forty-six thousand, one hundred fifty-nine".