16398309193 has 4 divisors (see below), whose sum is σ = 18740924800. Its totient is φ = 14055693588.

The previous prime is 16398309181. The next prime is 16398309203. The reversal of 16398309193 is 39190389361.

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 a de Polignac number, because none of the positive numbers 2^k-16398309193 is a prime.

It is a super-2 number, since 2×16398309193² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16398309193.

It is not an unprimeable number, because it can be changed into a prime (16398309143) 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, 1171307793 + ... + 1171307806.

It is an arithmetic number, because the mean of its divisors is an integer number (4685231200).

Almost surely, 2^16398309193 is an apocalyptic number.

It is an amenable number.

16398309193 is a deficient number, since it is larger than the sum of its proper divisors (2342615607).

16398309193 is an equidigital number, since it uses as much as digits as its factorization.

16398309193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2342615606.

The product of its (nonzero) digits is 944784, while the sum is 52.

The spelling of 16398309193 in words is "sixteen billion, three hundred ninety-eight million, three hundred nine thousand, one hundred ninety-three".