6556191726816 has 96 divisors (see below), whose sum is σ = 20128658860800. Its totient is φ = 2070376329600.

The previous prime is 6556191726737. The next prime is 6556191726857. The reversal of 6556191726816 is 6186271916556.

6556191726816 is a `hidden beast` number, since 6 + 5 + 5 + 619 + 1 + 7 + 2 + 6 + 8 + 1 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199672660 + ... + 199705491.

It is an arithmetic number, because the mean of its divisors is an integer number (209673529800).

Almost surely, 2^{6556191726816} is an apocalyptic number.

It is an amenable number.

6556191726816 is an abundant number, since it is smaller than the sum of its proper divisors (13572467133984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6556191726816 is a wasteful number, since it uses less digits than its factorization.

6556191726816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399378189 (or 399378175 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 63.

The spelling of 6556191726816 in words is "six trillion, five hundred fifty-six billion, one hundred ninety-one million, seven hundred twenty-six thousand, eight hundred sixteen".