2649540653 has 2 divisors, whose sum is σ = 2649540654. Its totient is φ = 2649540652.

The previous prime is 2649540623. The next prime is 2649540679. The reversal of 2649540653 is 3560459462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2639185129 + 10355524 = 51373^2 + 3218^2 .

It is a cyclic number.

It is not a de Polignac number, because 2649540653 - 2¹² = 2649536557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2649540623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1324770326 + 1324770327.

It is an arithmetic number, because the mean of its divisors is an integer number (1324770327).

Almost surely, 2^2649540653 is an apocalyptic number.

It is an amenable number.

2649540653 is a deficient number, since it is larger than the sum of its proper divisors (1).

2649540653 is an equidigital number, since it uses as much as digits as its factorization.

2649540653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 777600, while the sum is 44.

The square root of 2649540653 is about 51473.6889391075. The cubic root of 2649540653 is about 1383.7475421673.

The spelling of 2649540653 in words is "two billion, six hundred forty-nine million, five hundred forty thousand, six hundred fifty-three".