2253561649 has 2 divisors, whose sum is σ = 2253561650. Its totient is φ = 2253561648.

The previous prime is 2253561637. The next prime is 2253561721. The reversal of 2253561649 is 9461653522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2084561649 + 169000000 = 45657^2 + 13000^2 .

It is a cyclic number.

It is not a de Polignac number, because 2253561649 - 2²⁷ = 2119343921 is a prime.

It is not a weakly prime, because it can be changed into another prime (2253561619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1126780824 + 1126780825.

It is an arithmetic number, because the mean of its divisors is an integer number (1126780825).

Almost surely, 2^2253561649 is an apocalyptic number.

It is an amenable number.

2253561649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2253561649 is an equidigital number, since it uses as much as digits as its factorization.

2253561649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 388800, while the sum is 43.

The square root of 2253561649 is about 47471.6931339088. The cubic root of 2253561649 is about 1311.0617519272.

The spelling of 2253561649 in words is "two billion, two hundred fifty-three million, five hundred sixty-one thousand, six hundred forty-nine".