25660760269 has 2 divisors, whose sum is σ = 25660760270. Its totient is φ = 25660760268.

The previous prime is 25660760161. The next prime is 25660760299. The reversal of 25660760269 is 96206706652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25165697769 + 495062500 = 158637^2 + 22250^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25660760269 is a prime.

It is a super-2 number, since 2×25660760269² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25660760299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12830380134 + 12830380135.

It is an arithmetic number, because the mean of its divisors is an integer number (12830380135).

Almost surely, 2^25660760269 is an apocalyptic number.

It is an amenable number.

25660760269 is a deficient number, since it is larger than the sum of its proper divisors (1).

25660760269 is an equidigital number, since it uses as much as digits as its factorization.

25660760269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 49.

The spelling of 25660760269 in words is "twenty-five billion, six hundred sixty million, seven hundred sixty thousand, two hundred sixty-nine".