16990538880 has 128 divisors (see below), whose sum is σ = 61894154880. Its totient is φ = 3883548672.

The previous prime is 16990538833. The next prime is 16990538899. The reversal of 16990538880 is 8883509961.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-3 number, since 3×16990538880³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 16990538880.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 618649 + ... + 645528.

It is an arithmetic number, because the mean of its divisors is an integer number (483548085).

Almost surely, 2^16990538880 is an apocalyptic number.

16990538880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16990538880 is an abundant number, since it is smaller than the sum of its proper divisors (44903616000).

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

16990538880 is a wasteful number, since it uses less digits than its factorization.

16990538880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264206 (or 1264194 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 57.

The spelling of 16990538880 in words is "sixteen billion, nine hundred ninety million, five hundred thirty-eight thousand, eight hundred eighty".