2559649493 has 2 divisors, whose sum is σ = 2559649494. Its totient is φ = 2559649492.

The previous prime is 2559649457. The next prime is 2559649517. The reversal of 2559649493 is 3949469552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1391513809 + 1168135684 = 37303^2 + 34178^2 .

It is a cyclic number.

It is not a de Polignac number, because 2559649493 - 2⁸ = 2559649237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2559649403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1279824746 + 1279824747.

It is an arithmetic number, because the mean of its divisors is an integer number (1279824747).

Almost surely, 2^2559649493 is an apocalyptic number.

It is an amenable number.

2559649493 is a deficient number, since it is larger than the sum of its proper divisors (1).

2559649493 is an equidigital number, since it uses as much as digits as its factorization.

2559649493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10497600, while the sum is 56.

The square root of 2559649493 is about 50592.9786927000. The cubic root of 2559649493 is about 1367.9183213106.

The spelling of 2559649493 in words is "two billion, five hundred fifty-nine million, six hundred forty-nine thousand, four hundred ninety-three".