16881639377 has 4 divisors (see below), whose sum is σ = 17003090160. Its totient is φ = 16760188596.

The previous prime is 16881639371. The next prime is 16881639391. The reversal of 16881639377 is 77393618861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16881639377 - 2¹⁰ = 16881638353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16881639371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60725183 + ... + 60725460.

It is an arithmetic number, because the mean of its divisors is an integer number (4250772540).

Almost surely, 2^16881639377 is an apocalyptic number.

It is an amenable number.

16881639377 is a deficient number, since it is larger than the sum of its proper divisors (121450783).

16881639377 is a wasteful number, since it uses less digits than its factorization.

16881639377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121450782.

The product of its digits is 9144576, while the sum is 59.

The spelling of 16881639377 in words is "sixteen billion, eight hundred eighty-one million, six hundred thirty-nine thousand, three hundred seventy-seven".