25908726149 has 2 divisors, whose sum is σ = 25908726150. Its totient is φ = 25908726148.

The previous prime is 25908726139. The next prime is 25908726167. The reversal of 25908726149 is 94162780952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25283226049 + 625500100 = 159007^2 + 25010^2 .

It is a cyclic number.

It is not a de Polignac number, because 25908726149 - 2²⁰ = 25907677573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25908726149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25908726139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12954363074 + 12954363075.

It is an arithmetic number, because the mean of its divisors is an integer number (12954363075).

Almost surely, 2^25908726149 is an apocalyptic number.

It is an amenable number.

25908726149 is a deficient number, since it is larger than the sum of its proper divisors (1).

25908726149 is an equidigital number, since it uses as much as digits as its factorization.

25908726149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 25908726149 in words is "twenty-five billion, nine hundred eight million, seven hundred twenty-six thousand, one hundred forty-nine".