16893640368738 has 96 divisors (see below), whose sum is σ = 42292796232960. Its totient is φ = 4773849955200.

The previous prime is 16893640368721. The next prime is 16893640368823. The reversal of 16893640368738 is 83786304639861.

16893640368738 is a `hidden beast` number, since 1 + 6 + 8 + 93 + 6 + 403 + 68 + 73 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2418256 + ... + 6295652.

It is an arithmetic number, because the mean of its divisors is an integer number (440549960760).

Almost surely, 2^{16893640368738} is an apocalyptic number.

16893640368738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16893640368738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21146398116480).

16893640368738 is an abundant number, since it is smaller than the sum of its proper divisors (25399155864222).

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

16893640368738 is a wasteful number, since it uses less digits than its factorization.

16893640368738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3877792 (or 3877789 counting only the distinct ones).

The product of its (nonzero) digits is 752467968, while the sum is 72.

The spelling of 16893640368738 in words is "sixteen trillion, eight hundred ninety-three billion, six hundred forty million, three hundred sixty-eight thousand, seven hundred thirty-eight".