834186681438 has 64 divisors (see below), whose sum is σ = 1863104931072. Its totient is φ = 246807751680.

The previous prime is 834186681403. The next prime is 834186681533.

834186681438 is nontrivially palindromic in base 10.

834186681438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7302256 + ... + 7415612.

It is an arithmetic number, because the mean of its divisors is an integer number (29111014548).

Almost surely, 2^834186681438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 834186681438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (931552465536).

834186681438 is an abundant number, since it is smaller than the sum of its proper divisors (1028918249634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

834186681438 is a wasteful number, since it uses less digits than its factorization.

834186681438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116009.

The product of its digits is 21233664, while the sum is 60.

The spelling of 834186681438 in words is "eight hundred thirty-four billion, one hundred eighty-six million, six hundred eighty-one thousand, four hundred thirty-eight".