16997732856 has 192 divisors, whose sum is σ = 50198148000. Its totient is φ = 5165005824.

The previous prime is 16997732839. The next prime is 16997732879. The reversal of 16997732856 is 65823779961.

It is a junction number, because it is equal to n+sod(n) for n = 16997732793 and 16997732802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42815250 + ... + 42815646.

Almost surely, 2^16997732856 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 16997732856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25099074000).

16997732856 is an abundant number, since it is smaller than the sum of its proper divisors (33200415144).

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

16997732856 is a wasteful number, since it uses less digits than its factorization.

16997732856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878 (or 871 counting only the distinct ones).

The product of its digits is 34292160, while the sum is 63.

The spelling of 16997732856 in words is "sixteen billion, nine hundred ninety-seven million, seven hundred thirty-two thousand, eight hundred fifty-six".