25654614149 has 2 divisors, whose sum is σ = 25654614150. Its totient is φ = 25654614148.

The previous prime is 25654614101. The next prime is 25654614211. The reversal of 25654614149 is 94141645652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22614745924 + 3039868225 = 150382^2 + 55135^2 .

It is a cyclic number.

It is not a de Polignac number, because 25654614149 - 2¹⁶ = 25654548613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25654614049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12827307074 + 12827307075.

It is an arithmetic number, because the mean of its divisors is an integer number (12827307075).

Almost surely, 2^25654614149 is an apocalyptic number.

It is an amenable number.

25654614149 is a deficient number, since it is larger than the sum of its proper divisors (1).

25654614149 is an equidigital number, since it uses as much as digits as its factorization.

25654614149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1036800, while the sum is 47.

The spelling of 25654614149 in words is "twenty-five billion, six hundred fifty-four million, six hundred fourteen thousand, one hundred forty-nine".