6516116655651 has 32 divisors (see below), whose sum is σ = 9717782668800. Its totient is φ = 4315169233440.

The previous prime is 6516116655647. The next prime is 6516116655661. The reversal of 6516116655651 is 1565566116156.

6516116655651 is a `hidden beast` number, since 6 + 5 + 1 + 6 + 1 + 16 + 65 + 565 + 1 = 666.

It is not a de Polignac number, because 6516116655651 - 2² = 6516116655647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6516116655661) 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, 14664220 + ... + 15102038.

It is an arithmetic number, because the mean of its divisors is an integer number (303680708400).

Almost surely, 2^{6516116655651} is an apocalyptic number.

6516116655651 is a deficient number, since it is larger than the sum of its proper divisors (3201666013149).

6516116655651 is a wasteful number, since it uses less digits than its factorization.

6516116655651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441496 (or 441490 counting only the distinct ones).

The product of its digits is 4860000, while the sum is 54.

The spelling of 6516116655651 in words is "six trillion, five hundred sixteen billion, one hundred sixteen million, six hundred fifty-five thousand, six hundred fifty-one".