16993578946 has 16 divisors (see below), whose sum is σ = 26554049280. Its totient is φ = 8147258640.

The previous prime is 16993578941. The next prime is 16993579019. The reversal of 16993578946 is 64987539961.

16993578946 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (16993578941) 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, 1250536 + ... + 1264051.

It is an arithmetic number, because the mean of its divisors is an integer number (1659628080).

Almost surely, 2^16993578946 is an apocalyptic number.

16993578946 is a deficient number, since it is larger than the sum of its proper divisors (9560470334).

16993578946 is a wasteful number, since it uses less digits than its factorization.

16993578946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2514729.

The product of its digits is 88179840, while the sum is 67.

The spelling of 16993578946 in words is "sixteen billion, nine hundred ninety-three million, five hundred seventy-eight thousand, nine hundred forty-six".