16371423217 has 4 divisors (see below), whose sum is σ = 16475699956. Its totient is φ = 16267146480.

The previous prime is 16371423203. The next prime is 16371423323. The reversal of 16371423217 is 71232417361.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12303024561 + 4068398656 = 110919^2 + 63784^2 .

It is a cyclic number.

It is not a de Polignac number, because 16371423217 - 2¹⁵ = 16371390449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16371423917) 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, 52138134 + ... + 52138447.

It is an arithmetic number, because the mean of its divisors is an integer number (4118924989).

Almost surely, 2^16371423217 is an apocalyptic number.

It is an amenable number.

16371423217 is a deficient number, since it is larger than the sum of its proper divisors (104276739).

16371423217 is a wasteful number, since it uses less digits than its factorization.

16371423217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104276738.

The product of its digits is 42336, while the sum is 37.

The spelling of 16371423217 in words is "sixteen billion, three hundred seventy-one million, four hundred twenty-three thousand, two hundred seventeen".