16994440087838 has 4 divisors (see below), whose sum is σ = 25491660131760. Its totient is φ = 8497220043918.

The previous prime is 16994440087837. The next prime is 16994440087841. The reversal of 16994440087838 is 83878004449961.

16994440087838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16994440087837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4248610021958 + ... + 4248610021961.

It is an arithmetic number, because the mean of its divisors is an integer number (6372915032940).

Almost surely, 2^{16994440087838} is an apocalyptic number.

16994440087838 is a deficient number, since it is larger than the sum of its proper divisors (8497220043922).

16994440087838 is an equidigital number, since it uses as much as digits as its factorization.

16994440087838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8497220043921.

The product of its (nonzero) digits is 334430208, while the sum is 71.

The spelling of 16994440087838 in words is "sixteen trillion, nine hundred ninety-four billion, four hundred forty million, eighty-seven thousand, eight hundred thirty-eight".