25512123174949 has 2 divisors, whose sum is σ = 25512123174950. Its totient is φ = 25512123174948.

The previous prime is 25512123174919. The next prime is 25512123175027. The reversal of 25512123174949 is 94947132121552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25435328789025 + 76794385924 = 5043345^2 + 277118^2 .

It is a cyclic number.

It is not a de Polignac number, because 25512123174949 - 2⁵ = 25512123174917 is a prime.

It is a super-2 number, since 2×25512123174949² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25512123174949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25512123174919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12756061587474 + 12756061587475.

It is an arithmetic number, because the mean of its divisors is an integer number (12756061587475).

Almost surely, 2^{25512123174949} is an apocalyptic number.

It is an amenable number.

25512123174949 is a deficient number, since it is larger than the sum of its proper divisors (1).

25512123174949 is an equidigital number, since it uses as much as digits as its factorization.

25512123174949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5443200, while the sum is 55.

The spelling of 25512123174949 in words is "twenty-five trillion, five hundred twelve billion, one hundred twenty-three million, one hundred seventy-four thousand, nine hundred forty-nine".