5616778987 has 2 divisors, whose sum is σ = 5616778988. Its totient is φ = 5616778986.

The previous prime is 5616778919. The next prime is 5616778991. The reversal of 5616778987 is 7898776165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5616778987 - 2³¹ = 3469295339 is a prime.

It is not a weakly prime, because it can be changed into another prime (5616728987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2808389493 + 2808389494.

It is an arithmetic number, because the mean of its divisors is an integer number (2808389494).

Almost surely, 2^5616778987 is an apocalyptic number.

5616778987 is a deficient number, since it is larger than the sum of its proper divisors (1).

5616778987 is an equidigital number, since it uses as much as digits as its factorization.

5616778987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35562240, while the sum is 64.

The square root of 5616778987 is about 74945.1732068183. The cubic root of 5616778987 is about 1777.5798219287.

The spelling of 5616778987 in words is "five billion, six hundred sixteen million, seven hundred seventy-eight thousand, nine hundred eighty-seven".