2581120169 has 2 divisors, whose sum is σ = 2581120170. Its totient is φ = 2581120168.

The previous prime is 2581120049. The next prime is 2581120231. The reversal of 2581120169 is 9610211852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1473561769 + 1107558400 = 38387^2 + 33280^2 .

It is a cyclic number.

It is not a de Polignac number, because 2581120169 - 2⁸ = 2581119913 is a prime.

It is a super-2 number, since 2×2581120169² = 13324362653637177122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2281120169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1290560084 + 1290560085.

It is an arithmetic number, because the mean of its divisors is an integer number (1290560085).

Almost surely, 2^2581120169 is an apocalyptic number.

It is an amenable number.

2581120169 is a deficient number, since it is larger than the sum of its proper divisors (1).

2581120169 is an equidigital number, since it uses as much as digits as its factorization.

2581120169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 2581120169 is about 50804.7258530149. The cubic root of 2581120169 is about 1371.7324361648.

The spelling of 2581120169 in words is "two billion, five hundred eighty-one million, one hundred twenty thousand, one hundred sixty-nine".