6516005516691 has 32 divisors (see below), whose sum is σ = 9495899433216. Its totient is φ = 3941570688000.

The previous prime is 6516005516651. The next prime is 6516005516693. The reversal of 6516005516691 is 1966155006156.

It is not a de Polignac number, because 6516005516691 - 2¹⁰ = 6516005515667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6516005516693) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37912671 + ... + 38084151.

It is an arithmetic number, because the mean of its divisors is an integer number (296746857288).

Almost surely, 2^{6516005516691} is an apocalyptic number.

6516005516691 is a deficient number, since it is larger than the sum of its proper divisors (2979893916525).

6516005516691 is a wasteful number, since it uses less digits than its factorization.

6516005516691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173683.

The product of its (nonzero) digits is 1458000, while the sum is 51.

The spelling of 6516005516691 in words is "six trillion, five hundred sixteen billion, five million, five hundred sixteen thousand, six hundred ninety-one".