25552805149 has 2 divisors, whose sum is σ = 25552805150. Its totient is φ = 25552805148.

The previous prime is 25552805123. The next prime is 25552805203. The reversal of 25552805149 is 94150825552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13872599524 + 11680205625 = 117782^2 + 108075^2 .

It is a cyclic number.

It is not a de Polignac number, because 25552805149 - 2¹⁹ = 25552280861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25552805099 and 25552805108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25552805449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12776402574 + 12776402575.

It is an arithmetic number, because the mean of its divisors is an integer number (12776402575).

Almost surely, 2^25552805149 is an apocalyptic number.

It is an amenable number.

25552805149 is a deficient number, since it is larger than the sum of its proper divisors (1).

25552805149 is an equidigital number, since it uses as much as digits as its factorization.

25552805149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720000, while the sum is 46.

The spelling of 25552805149 in words is "twenty-five billion, five hundred fifty-two million, eight hundred five thousand, one hundred forty-nine".