5616778891 has 8 divisors (see below), whose sum is σ = 5629104720. Its totient is φ = 5604467232.

The previous prime is 5616778823. The next prime is 5616778919. The reversal of 5616778891 is 1988776165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5616778891 - 2⁷ = 5616778763 is a prime.

It is a super-2 number, since 2×5616778891² = 63096410220766379762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5616778591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1184361 + ... + 1189093.

It is an arithmetic number, because the mean of its divisors is an integer number (703638090).

Almost surely, 2^5616778891 is an apocalyptic number.

5616778891 is a deficient number, since it is larger than the sum of its proper divisors (12325829).

5616778891 is a wasteful number, since it uses less digits than its factorization.

5616778891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7085.

The product of its digits is 5080320, while the sum is 58.

The square root of 5616778891 is about 74945.1725663501. The cubic root of 5616778891 is about 1777.5798118015.

The spelling of 5616778891 in words is "five billion, six hundred sixteen million, seven hundred seventy-eight thousand, eight hundred ninety-one".