25354977516149 has 2 divisors, whose sum is σ = 25354977516150. Its totient is φ = 25354977516148.

The previous prime is 25354977516073. The next prime is 25354977516161. The reversal of 25354977516149 is 94161577945352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25273926273124 + 81051243025 = 5027318^2 + 284695^2 .

It is a cyclic number.

It is not a de Polignac number, because 25354977516149 - 2²⁰ = 25354976467573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25354977516049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12677488758074 + 12677488758075.

It is an arithmetic number, because the mean of its divisors is an integer number (12677488758075).

Almost surely, 2^{25354977516149} is an apocalyptic number.

It is an amenable number.

25354977516149 is a deficient number, since it is larger than the sum of its proper divisors (1).

25354977516149 is an equidigital number, since it uses as much as digits as its factorization.

25354977516149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768000, while the sum is 68.

The spelling of 25354977516149 in words is "twenty-five trillion, three hundred fifty-four billion, nine hundred seventy-seven million, five hundred sixteen thousand, one hundred forty-nine".