16845374081 has 4 divisors (see below), whose sum is σ = 16846848000. Its totient is φ = 16843900164.

The previous prime is 16845374033. The next prime is 16845374089. The reversal of 16845374081 is 18047354861.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18047354861 = 43 ⋅419705927.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16845374081 is a prime.

It is a super-2 number, since 2×16845374081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16845374089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 719681 + ... + 742718.

It is an arithmetic number, because the mean of its divisors is an integer number (4211712000).

Almost surely, 2^16845374081 is an apocalyptic number.

It is an amenable number.

16845374081 is a deficient number, since it is larger than the sum of its proper divisors (1473919).

16845374081 is a wasteful number, since it uses less digits than its factorization.

16845374081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473918.

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 16845374081 in words is "sixteen billion, eight hundred forty-five million, three hundred seventy-four thousand, eighty-one".