2554661209 has 2 divisors, whose sum is σ = 2554661210. Its totient is φ = 2554661208.

The previous prime is 2554661203. The next prime is 2554661269. The reversal of 2554661209 is 9021664552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2263856400 + 290804809 = 47580^2 + 17053^2 .

It is a cyclic number.

It is not a de Polignac number, because 2554661209 - 2⁵ = 2554661177 is a prime.

It is not a weakly prime, because it can be changed into another prime (2554661203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1277330604 + 1277330605.

It is an arithmetic number, because the mean of its divisors is an integer number (1277330605).

Almost surely, 2^2554661209 is an apocalyptic number.

It is an amenable number.

2554661209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2554661209 is an equidigital number, since it uses as much as digits as its factorization.

2554661209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 2554661209 is about 50543.6564664647. The cubic root of 2554661209 is about 1367.0291367403.

The spelling of 2554661209 in words is "two billion, five hundred fifty-four million, six hundred sixty-one thousand, two hundred nine".