5613645649 has 2 divisors, whose sum is σ = 5613645650. Its totient is φ = 5613645648.

The previous prime is 5613645647. The next prime is 5613645689. The reversal of 5613645649 is 9465463165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5486068624 + 127577025 = 74068^2 + 11295^2 .

It is a cyclic number.

It is not a de Polignac number, because 5613645649 - 2¹ = 5613645647 is a prime.

Together with 5613645647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5613645647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2806822824 + 2806822825.

It is an arithmetic number, because the mean of its divisors is an integer number (2806822825).

Almost surely, 2^5613645649 is an apocalyptic number.

It is an amenable number.

5613645649 is a deficient number, since it is larger than the sum of its proper divisors (1).

5613645649 is an equidigital number, since it uses as much as digits as its factorization.

5613645649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2332800, while the sum is 49.

The square root of 5613645649 is about 74924.2660891650. The cubic root of 5613645649 is about 1777.2492175948.

The spelling of 5613645649 in words is "five billion, six hundred thirteen million, six hundred forty-five thousand, six hundred forty-nine".