16838871681 has 16 divisors (see below), whose sum is σ = 23316871424. Its totient is φ = 10801186704.

The previous prime is 16838871661. The next prime is 16838871691. The reversal of 16838871681 is 18617883861.

It is not a de Polignac number, because 16838871681 - 2²³ = 16830483073 is a prime.

It is a super-2 number, since 2×16838871681² (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 (16838871641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 965491 + ... + 982776.

It is an arithmetic number, because the mean of its divisors is an integer number (1457304464).

Almost surely, 2^16838871681 is an apocalyptic number.

It is an amenable number.

16838871681 is a deficient number, since it is larger than the sum of its proper divisors (6477999743).

16838871681 is a wasteful number, since it uses less digits than its factorization.

16838871681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1948380.

The product of its digits is 3096576, while the sum is 57.

The spelling of 16838871681 in words is "sixteen billion, eight hundred thirty-eight million, eight hundred seventy-one thousand, six hundred eighty-one".