16118943693 has 4 divisors (see below), whose sum is σ = 21491924928. Its totient is φ = 10745962460.

The previous prime is 16118943679. The next prime is 16118943713. The reversal of 16118943693 is 39634981161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16118943693 - 2⁴ = 16118943677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16118943623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2686490613 + ... + 2686490618.

It is an arithmetic number, because the mean of its divisors is an integer number (5372981232).

Almost surely, 2^16118943693 is an apocalyptic number.

It is an amenable number.

16118943693 is a deficient number, since it is larger than the sum of its proper divisors (5372981235).

16118943693 is an equidigital number, since it uses as much as digits as its factorization.

16118943693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5372981234.

The product of its digits is 839808, while the sum is 51.

The spelling of 16118943693 in words is "sixteen billion, one hundred eighteen million, nine hundred forty-three thousand, six hundred ninety-three".