16878981216432 has 90 divisors (see below), whose sum is σ = 43717642081932. Its totient is φ = 5611706138112.

The previous prime is 16878981216407. The next prime is 16878981216473. The reversal of 16878981216432 is 23461218987861.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 20864006044 + ... + 20864006852.

Almost surely, 2^{16878981216432} is an apocalyptic number.

16878981216432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16878981216432 is an abundant number, since it is smaller than the sum of its proper divisors (26838660865500).

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

16878981216432 is an frugal number, since it uses more digits than its factorization.

16878981216432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3095 (or 1547 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 66.

The spelling of 16878981216432 in words is "sixteen trillion, eight hundred seventy-eight billion, nine hundred eighty-one million, two hundred sixteen thousand, four hundred thirty-two".