16687517028 has 144 divisors (see below), whose sum is σ = 49064742720. Its totient is φ = 4375316736.

The previous prime is 16687516997. The next prime is 16687517053. The reversal of 16687517028 is 82071578661.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1316103 + ... + 1328721.

It is an arithmetic number, because the mean of its divisors is an integer number (340727380).

Almost surely, 2^16687517028 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 16687517028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24532371360).

16687517028 is an abundant number, since it is smaller than the sum of its proper divisors (32377225692).

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

16687517028 is a wasteful number, since it uses less digits than its factorization.

16687517028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12826 (or 12817 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 51.

The spelling of 16687517028 in words is "sixteen billion, six hundred eighty-seven million, five hundred seventeen thousand, twenty-eight".