16180991493494 has 4 divisors (see below), whose sum is σ = 24271487240244. Its totient is φ = 8090495746746.

The previous prime is 16180991493449. The next prime is 16180991493539. The reversal of 16180991493494 is 49439419908161.

16180991493494 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 an interprime number because it is at equal distance from previous prime (16180991493449) and next prime (16180991493539).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4045247873372 + ... + 4045247873375.

It is an arithmetic number, because the mean of its divisors is an integer number (6067871810061).

Almost surely, 2^{16180991493494} is an apocalyptic number.

16180991493494 is a deficient number, since it is larger than the sum of its proper divisors (8090495746750).

16180991493494 is an equidigital number, since it uses as much as digits as its factorization.

16180991493494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8090495746749.

The product of its (nonzero) digits is 60466176, while the sum is 68.

The spelling of 16180991493494 in words is "sixteen trillion, one hundred eighty billion, nine hundred ninety-one million, four hundred ninety-three thousand, four hundred ninety-four".