25918926149 has 2 divisors, whose sum is σ = 25918926150. Its totient is φ = 25918926148.

The previous prime is 25918926139. The next prime is 25918926157. The reversal of 25918926149 is 94162981952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19336849249 + 6582076900 = 139057^2 + 81130^2 .

It is a cyclic number.

It is not a de Polignac number, because 25918926149 - 2¹⁶ = 25918860613 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25918926094 and 25918926103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25918926109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12959463074 + 12959463075.

It is an arithmetic number, because the mean of its divisors is an integer number (12959463075).

Almost surely, 2^25918926149 is an apocalyptic number.

It is an amenable number.

25918926149 is a deficient number, since it is larger than the sum of its proper divisors (1).

25918926149 is an equidigital number, since it uses as much as digits as its factorization.

25918926149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2799360, while the sum is 56.

The spelling of 25918926149 in words is "twenty-five billion, nine hundred eighteen million, nine hundred twenty-six thousand, one hundred forty-nine".