6556616615564 has 12 divisors (see below), whose sum is σ = 11475034458888. Its totient is φ = 3278035341600.

The previous prime is 6556616615533. The next prime is 6556616615569. The reversal of 6556616615564 is 4655166166556.

It is a junction number, because it is equal to n+sod(n) for n = 6556616615497 and 6556616615506.

It is not an unprimeable number, because it can be changed into a prime (6556616615569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68187497 + ... + 68283584.

It is an arithmetic number, because the mean of its divisors is an integer number (956252871574).

Almost surely, 2^{6556616615564} is an apocalyptic number.

It is an amenable number.

6556616615564 is a deficient number, since it is larger than the sum of its proper divisors (4918417843324).

6556616615564 is a wasteful number, since it uses less digits than its factorization.

6556616615564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136483096 (or 136483094 counting only the distinct ones).

The product of its digits is 116640000, while the sum is 62.

The spelling of 6556616615564 in words is "six trillion, five hundred fifty-six billion, six hundred sixteen million, six hundred fifteen thousand, five hundred sixty-four".