6516139856554 has 8 divisors (see below), whose sum is σ = 9774245459520. Its totient is φ = 3258058036716.

The previous prime is 6516139856507. The next prime is 6516139856651. The reversal of 6516139856554 is 4556589316156.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5244274 + ... + 6366685.

It is an arithmetic number, because the mean of its divisors is an integer number (1221780682440).

Almost surely, 2^{6516139856554} is an apocalyptic number.

6516139856554 is a deficient number, since it is larger than the sum of its proper divisors (3258105602966).

6516139856554 is a wasteful number, since it uses less digits than its factorization.

6516139856554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11891564.

The product of its digits is 116640000, while the sum is 64.

The spelling of 6516139856554 in words is "six trillion, five hundred sixteen billion, one hundred thirty-nine million, eight hundred fifty-six thousand, five hundred fifty-four".