16838581811 has 4 divisors (see below), whose sum is σ = 16923198000. Its totient is φ = 16753965624.

The previous prime is 16838581801. The next prime is 16838581817. The reversal of 16838581811 is 11818583861.

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

It is a cyclic number.

It is not a de Polignac number, because 16838581811 - 2²⁶ = 16771472947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16838581811.

It is not an unprimeable number, because it can be changed into a prime (16838581817) 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, 42307796 + ... + 42308193.

It is an arithmetic number, because the mean of its divisors is an integer number (4230799500).

Almost surely, 2^16838581811 is an apocalyptic number.

16838581811 is a deficient number, since it is larger than the sum of its proper divisors (84616189).

16838581811 is an equidigital number, since it uses as much as digits as its factorization.

16838581811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84616188.

The product of its digits is 368640, while the sum is 50.

The spelling of 16838581811 in words is "sixteen billion, eight hundred thirty-eight million, five hundred eighty-one thousand, eight hundred eleven".