16939961988 has 12 divisors (see below), whose sum is σ = 39526578000. Its totient is φ = 5646653992.

The previous prime is 16939961971. The next prime is 16939961999. The reversal of 16939961988 is 88916993961.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 705831738 + ... + 705831761.

It is an arithmetic number, because the mean of its divisors is an integer number (3293881500).

Almost surely, 2^16939961988 is an apocalyptic number.

It is an amenable number.

16939961988 is an abundant number, since it is smaller than the sum of its proper divisors (22586616012).

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

16939961988 is a wasteful number, since it uses less digits than its factorization.

16939961988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411663506 (or 1411663504 counting only the distinct ones).

The product of its digits is 45349632, while the sum is 69.

The spelling of 16939961988 in words is "sixteen billion, nine hundred thirty-nine million, nine hundred sixty-one thousand, nine hundred eighty-eight".