16994978889 has 16 divisors (see below), whose sum is σ = 26070921600. Its totient is φ = 9646237440.

The previous prime is 16994978873. The next prime is 16994978893. The reversal of 16994978889 is 98887949961.

It is not a de Polignac number, because 16994978889 - 2⁴ = 16994978873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16994978389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2712592 + ... + 2718849.

It is an arithmetic number, because the mean of its divisors is an integer number (1629432600).

Almost surely, 2^16994978889 is an apocalyptic number.

It is an amenable number.

16994978889 is a deficient number, since it is larger than the sum of its proper divisors (9075942711).

16994978889 is a wasteful number, since it uses less digits than its factorization.

16994978889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5431600.

The product of its digits is 564350976, while the sum is 78.

The spelling of 16994978889 in words is "sixteen billion, nine hundred ninety-four million, nine hundred seventy-eight thousand, eight hundred eighty-nine".