6557323687992 has 1296 divisors, whose sum is σ = 24843338793000. Its totient is φ = 1612103834880.

The previous prime is 6557323687939. The next prime is 6557323688023. The reversal of 6557323687992 is 2997863237556.

6557323687992 is a `hidden beast` number, since 6 + 557 + 3 + 2 + 3 + 68 + 7 + 9 + 9 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 6557323687992.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 323 ways as a sum of consecutive naturals, for example, 5912825134 + ... + 5912826242.

Almost surely, 2^{6557323687992} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6557323687992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12421669396500).

6557323687992 is an abundant number, since it is smaller than the sum of its proper divisors (18286015105008).

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

6557323687992 is a wasteful number, since it uses less digits than its factorization.

6557323687992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1194 (or 1151 counting only the distinct ones).

The product of its digits is 1028764800, while the sum is 72.

The spelling of 6557323687992 in words is "six trillion, five hundred fifty-seven billion, three hundred twenty-three million, six hundred eighty-seven thousand, nine hundred ninety-two".