16938863887 has 8 divisors (see below), whose sum is σ = 18624264192. Its totient is φ = 15277714200.

The previous prime is 16938863839. The next prime is 16938863891. The reversal of 16938863887 is 78836883961.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16938863887 - 2¹¹ = 16938861839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16938863897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6061189 + ... + 6063982.

It is an arithmetic number, because the mean of its divisors is an integer number (2328033024).

Almost surely, 2^16938863887 is an apocalyptic number.

16938863887 is a deficient number, since it is larger than the sum of its proper divisors (1685400305).

16938863887 is a wasteful number, since it uses less digits than its factorization.

16938863887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12125309.

The product of its digits is 83607552, while the sum is 67.

The spelling of 16938863887 in words is "sixteen billion, nine hundred thirty-eight million, eight hundred sixty-three thousand, eight hundred eighty-seven".