25188069149 has 2 divisors, whose sum is σ = 25188069150. Its totient is φ = 25188069148.

The previous prime is 25188069119. The next prime is 25188069163. The reversal of 25188069149 is 94196088152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16739701924 + 8448367225 = 129382^2 + 91915^2 .

It is a cyclic number.

It is not a de Polignac number, because 25188069149 - 2¹⁶ = 25188003613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25188069149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25188069119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12594034574 + 12594034575.

It is an arithmetic number, because the mean of its divisors is an integer number (12594034575).

Almost surely, 2^25188069149 is an apocalyptic number.

It is an amenable number.

25188069149 is a deficient number, since it is larger than the sum of its proper divisors (1).

25188069149 is an equidigital number, since it uses as much as digits as its factorization.

25188069149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 53.

The spelling of 25188069149 in words is "twenty-five billion, one hundred eighty-eight million, sixty-nine thousand, one hundred forty-nine".