25655706149 has 2 divisors, whose sum is σ = 25655706150. Its totient is φ = 25655706148.

The previous prime is 25655706121. The next prime is 25655706169. The reversal of 25655706149 is 94160755652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22904703649 + 2751002500 = 151343^2 + 52450^2 .

It is a cyclic number.

It is not a de Polignac number, because 25655706149 - 2⁸ = 25655705893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25655706097 and 25655706106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25655706169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12827853074 + 12827853075.

It is an arithmetic number, because the mean of its divisors is an integer number (12827853075).

Almost surely, 2^25655706149 is an apocalyptic number.

It is an amenable number.

25655706149 is a deficient number, since it is larger than the sum of its proper divisors (1).

25655706149 is an equidigital number, since it uses as much as digits as its factorization.

25655706149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268000, while the sum is 50.

The spelling of 25655706149 in words is "twenty-five billion, six hundred fifty-five million, seven hundred six thousand, one hundred forty-nine".