5615883661 has 2 divisors, whose sum is σ = 5615883662. Its totient is φ = 5615883660.

The previous prime is 5615883659. The next prime is 5615883697. The reversal of 5615883661 is 1663885165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5278022500 + 337861161 = 72650^2 + 18381^2 .

It is a cyclic number.

It is not a de Polignac number, because 5615883661 - 2¹ = 5615883659 is a prime.

Together with 5615883659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5615883601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2807941830 + 2807941831.

It is an arithmetic number, because the mean of its divisors is an integer number (2807941831).

Almost surely, 2^5615883661 is an apocalyptic number.

It is an amenable number.

5615883661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5615883661 is an equidigital number, since it uses as much as digits as its factorization.

5615883661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1036800, while the sum is 49.

The square root of 5615883661 is about 74939.1997622072. The cubic root of 5615883661 is about 1777.4853669629.

The spelling of 5615883661 in words is "five billion, six hundred fifteen million, eight hundred eighty-three thousand, six hundred sixty-one".