16696228856580 has 1200 divisors, whose sum is σ = 66893781326064. Its totient is φ = 3464331171840.

The previous prime is 16696228856579. The next prime is 16696228856611. The reversal of 16696228856580 is 8565882269661.

16696228856580 is a `hidden beast` number, since 16 + 6 + 9 + 6 + 2 + 28 + 8 + 5 + 6 + 580 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 7231893451524 + 9464335405056 = 2689218^2 + 3076416^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16696228856499 and 16696228856508.

It is an unprimeable number.

It is a polite number, since it can be written in 399 ways as a sum of consecutive naturals, for example, 3084465954 + ... + 3084471366.

Almost surely, 2^{16696228856580} is an apocalyptic number.

16696228856580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16696228856580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33446890663032).

16696228856580 is an abundant number, since it is smaller than the sum of its proper divisors (50197552469484).

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

16696228856580 is a wasteful number, since it uses less digits than its factorization.

16696228856580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5536 (or 5504 counting only the distinct ones).

The product of its (nonzero) digits is 597196800, while the sum is 72.

The spelling of 16696228856580 in words is "sixteen trillion, six hundred ninety-six billion, two hundred twenty-eight million, eight hundred fifty-six thousand, five hundred eighty".