16864851280 has 40 divisors (see below), whose sum is σ = 39747926952. Its totient is φ = 6653528064.

The previous prime is 16864851251. The next prime is 16864851329. The reversal of 16864851280 is 8215846861.

It can be written as a sum of positive squares in 4 ways, for example, as 8503056 + 16856348224 = 2916^2 + 129832^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1438069 + ... + 1449748.

Almost surely, 2^16864851280 is an apocalyptic number.

16864851280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16864851280 is an abundant number, since it is smaller than the sum of its proper divisors (22883075672).

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

16864851280 is a wasteful number, since it uses less digits than its factorization.

16864851280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887903 (or 2887897 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 49.

The spelling of 16864851280 in words is "sixteen billion, eight hundred sixty-four million, eight hundred fifty-one thousand, two hundred eighty".