2561466253 has 2 divisors, whose sum is σ = 2561466254. Its totient is φ = 2561466252.

The previous prime is 2561466241. The next prime is 2561466283. The reversal of 2561466253 is 3526641652.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1777634244 + 783832009 = 42162^2 + 27997^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2561466253 is a prime.

It is a super-2 number, since 2×2561466253² = 13122218730515720018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2561466223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1280733126 + 1280733127.

It is an arithmetic number, because the mean of its divisors is an integer number (1280733127).

Almost surely, 2^2561466253 is an apocalyptic number.

It is an amenable number.

2561466253 is a deficient number, since it is larger than the sum of its proper divisors (1).

2561466253 is an equidigital number, since it uses as much as digits as its factorization.

2561466253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 40.

The square root of 2561466253 is about 50610.9301732343. The cubic root of 2561466253 is about 1368.2418801364.

The spelling of 2561466253 in words is "two billion, five hundred sixty-one million, four hundred sixty-six thousand, two hundred fifty-three".