16393831897 has 8 divisors (see below), whose sum is σ = 16985583360. Its totient is φ = 15806012880.

The previous prime is 16393831891. The next prime is 16393831903. The reversal of 16393831897 is 79813839361.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16393831891) and next prime (16393831903).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16393831897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16393831891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 974623 + ... + 991300.

It is an arithmetic number, because the mean of its divisors is an integer number (2123197920).

Almost surely, 2^16393831897 is an apocalyptic number.

It is an amenable number.

16393831897 is a deficient number, since it is larger than the sum of its proper divisors (591751463).

16393831897 is a wasteful number, since it uses less digits than its factorization.

16393831897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1966223.

The product of its digits is 5878656, while the sum is 58.

The spelling of 16393831897 in words is "sixteen billion, three hundred ninety-three million, eight hundred thirty-one thousand, eight hundred ninety-seven".