16856373497 has 4 divisors (see below), whose sum is σ = 16857045840. Its totient is φ = 16855701156.

The previous prime is 16856373461. The next prime is 16856373503. The reversal of 16856373497 is 79437365861.

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 16856373497 - 2¹⁶ = 16856307961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16856373407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297047 + ... + 349212.

It is an arithmetic number, because the mean of its divisors is an integer number (4214261460).

Almost surely, 2^16856373497 is an apocalyptic number.

It is an amenable number.

16856373497 is a deficient number, since it is larger than the sum of its proper divisors (672343).

16856373497 is an equidigital number, since it uses as much as digits as its factorization.

16856373497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672342.

The product of its digits is 22861440, while the sum is 59.

The spelling of 16856373497 in words is "sixteen billion, eight hundred fifty-six million, three hundred seventy-three thousand, four hundred ninety-seven".