16989699538944 has 1792 divisors, whose sum is σ = 60650346153600. Its totient is φ = 4701133209600.

The previous prime is 16989699538937. The next prime is 16989699538967. The reversal of 16989699538944 is 44983599698961.

16989699538944 is a `hidden beast` number, since 1 + 6 + 9 + 8 + 9 + 69 + 9 + 538 + 9 + 4 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 204695175127 + ... + 204695175209.

Almost surely, 2^{16989699538944} 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 16989699538944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30325173076800).

16989699538944 is an abundant number, since it is smaller than the sum of its proper divisors (43660646614656).

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

16989699538944 is an frugal number, since it uses more digits than its factorization.

16989699538944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 159 counting only the distinct ones).

The product of its digits is 32651735040, while the sum is 90.

The spelling of 16989699538944 in words is "sixteen trillion, nine hundred eighty-nine billion, six hundred ninety-nine million, five hundred thirty-eight thousand, nine hundred forty-four".