2559651649 has 3 divisors (see below), whose sum is σ = 2559702243. Its totient is φ = 2559601056.

The previous prime is 2559651593. The next prime is 2559651673. The reversal of 2559651649 is 9461569552.

The square root of 2559651649 is 50593.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1232361025 + 1327290624 = 35105^2 + 36432^2 .

It is not a de Polignac number, because 2559651649 - 2⁹ = 2559651137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2559651596 and 2559651605.

It is not an unprimeable number, because it can be changed into a prime (2559651449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 25297 + ... + 75889.

It is an arithmetic number, because the mean of its divisors is an integer number (853234081).

Almost surely, 2^2559651649 is an apocalyptic number.

2559651649 is the 50593-rd square number.

2559651649 is the 25297-th centered octagonal number.

It is an amenable number.

2559651649 is a deficient number, since it is larger than the sum of its proper divisors (50594).

2559651649 is an frugal number, since it uses more digits than its factorization.

2559651649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101186 (or 50593 counting only the distinct ones).

The product of its digits is 2916000, while the sum is 52.

The cubic root of 2559651649 is about 1367.9187053776.

The spelling of 2559651649 in words is "two billion, five hundred fifty-nine million, six hundred fifty-one thousand, six hundred forty-nine".