16810145081 has 4 divisors (see below), whose sum is σ = 16811476992. Its totient is φ = 16808813172.

The previous prime is 16810145059. The next prime is 16810145083. The reversal of 16810145081 is 18054101861.

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-16810145081 is a prime.

It is a super-2 number, since 2×16810145081² (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 (16810145083) 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, 646841 + ... + 672326.

It is an arithmetic number, because the mean of its divisors is an integer number (4202869248).

Almost surely, 2^16810145081 is an apocalyptic number.

It is an amenable number.

16810145081 is a deficient number, since it is larger than the sum of its proper divisors (1331911).

16810145081 is a wasteful number, since it uses less digits than its factorization.

16810145081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331910.

The product of its (nonzero) digits is 7680, while the sum is 35.

The spelling of 16810145081 in words is "sixteen billion, eight hundred ten million, one hundred forty-five thousand, eighty-one".