2635947649 has 2 divisors, whose sum is σ = 2635947650. Its totient is φ = 2635947648.

The previous prime is 2635947623. The next prime is 2635947679. The reversal of 2635947649 is 9467495362.

2635947649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2285509249 + 350438400 = 47807^2 + 18720^2 .

It is a cyclic number.

It is not a de Polignac number, because 2635947649 - 2⁷ = 2635947521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2635947649.

It is not a weakly prime, because it can be changed into another prime (2635947619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1317973824 + 1317973825.

It is an arithmetic number, because the mean of its divisors is an integer number (1317973825).

Almost surely, 2^2635947649 is an apocalyptic number.

It is an amenable number.

2635947649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2635947649 is an equidigital number, since it uses as much as digits as its factorization.

2635947649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9797760, while the sum is 55.

The square root of 2635947649 is about 51341.4807830861. The cubic root of 2635947649 is about 1381.3771257754.

The spelling of 2635947649 in words is "two billion, six hundred thirty-five million, nine hundred forty-seven thousand, six hundred forty-nine".