25049189569 has 2 divisors, whose sum is σ = 25049189570. Its totient is φ = 25049189568.

The previous prime is 25049189533. The next prime is 25049189573. The reversal of 25049189569 is 96598194052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16384000000 + 8665189569 = 128000^2 + 93087^2 .

It is a cyclic number.

It is not a de Polignac number, because 25049189569 - 2⁷ = 25049189441 is a prime.

It is a super-2 number, since 2×25049189569² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25049189509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12524594784 + 12524594785.

It is an arithmetic number, because the mean of its divisors is an integer number (12524594785).

Almost surely, 2^25049189569 is an apocalyptic number.

It is an amenable number.

25049189569 is a deficient number, since it is larger than the sum of its proper divisors (1).

25049189569 is an equidigital number, since it uses as much as digits as its factorization.

25049189569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6998400, while the sum is 58.

The spelling of 25049189569 in words is "twenty-five billion, forty-nine million, one hundred eighty-nine thousand, five hundred sixty-nine".