16834277981 has 4 divisors (see below), whose sum is σ = 16839248700. Its totient is φ = 16829307264.

The previous prime is 16834277959. The next prime is 16834277983. The reversal of 16834277981 is 18977243861.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16418321956 + 415956025 = 128134^2 + 20395^2 .

It is a cyclic number.

It is not a de Polignac number, because 16834277981 - 2¹⁰ = 16834276957 is a prime.

It is a super-2 number, since 2×16834277981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16834277983) 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, 2480276 + ... + 2487053.

It is an arithmetic number, because the mean of its divisors is an integer number (4209812175).

Almost surely, 2^16834277981 is an apocalyptic number.

It is an amenable number.

16834277981 is a deficient number, since it is larger than the sum of its proper divisors (4970719).

16834277981 is an equidigital number, since it uses as much as digits as its factorization.

16834277981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4970718.

The product of its digits is 4064256, while the sum is 56.

The spelling of 16834277981 in words is "sixteen billion, eight hundred thirty-four million, two hundred seventy-seven thousand, nine hundred eighty-one".