25298669909 has 2 divisors, whose sum is σ = 25298669910. Its totient is φ = 25298669908.

The previous prime is 25298669839. The next prime is 25298669927. The reversal of 25298669909 is 90996689252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16225154884 + 9073515025 = 127378^2 + 95255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25298669909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25298669959) 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, 12649334954 + 12649334955.

It is an arithmetic number, because the mean of its divisors is an integer number (12649334955).

Almost surely, 2^25298669909 is an apocalyptic number.

It is an amenable number.

25298669909 is a deficient number, since it is larger than the sum of its proper divisors (1).

25298669909 is an equidigital number, since it uses as much as digits as its factorization.

25298669909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37791360, while the sum is 65.

The spelling of 25298669909 in words is "twenty-five billion, two hundred ninety-eight million, six hundred sixty-nine thousand, nine hundred nine".