5616661491 has 12 divisors (see below), whose sum is σ = 9271949232. Its totient is φ = 3209520816.

The previous prime is 5616661483. The next prime is 5616661493. The reversal of 5616661491 is 1941666165.

It is not a de Polignac number, because 5616661491 - 2³ = 5616661483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5616661493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44576616 + ... + 44576741.

It is an arithmetic number, because the mean of its divisors is an integer number (772662436).

Almost surely, 2^5616661491 is an apocalyptic number.

5616661491 is a deficient number, since it is larger than the sum of its proper divisors (3655287741).

5616661491 is a wasteful number, since it uses less digits than its factorization.

5616661491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89153370 (or 89153367 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 5616661491 is about 74944.3893230174. The cubic root of 5616661491 is about 1777.5674269259.

The spelling of 5616661491 in words is "five billion, six hundred sixteen million, six hundred sixty-one thousand, four hundred ninety-one".