5613961649 has 2 divisors, whose sum is σ = 5613961650. Its totient is φ = 5613961648.

The previous prime is 5613961643. The next prime is 5613961657. The reversal of 5613961649 is 9461693165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4281346624 + 1332615025 = 65432^2 + 36505^2 .

It is a cyclic number.

It is not a de Polignac number, because 5613961649 - 2⁸ = 5613961393 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5613961597 and 5613961606.

It is not a weakly prime, because it can be changed into another prime (5613961643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2806980824 + 2806980825.

It is an arithmetic number, because the mean of its divisors is an integer number (2806980825).

Almost surely, 2^5613961649 is an apocalyptic number.

It is an amenable number.

5613961649 is a deficient number, since it is larger than the sum of its proper divisors (1).

5613961649 is an equidigital number, since it uses as much as digits as its factorization.

5613961649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 50.

The square root of 5613961649 is about 74926.3748555874. The cubic root of 5613961649 is about 1777.2825649208.

The spelling of 5613961649 in words is "five billion, six hundred thirteen million, nine hundred sixty-one thousand, six hundred forty-nine".