831339391581690 has 128 divisors (see below), whose sum is σ = 2055765205942272. Its totient is φ = 215037943034880.

The previous prime is 831339391581689. The next prime is 831339391581709. The reversal of 831339391581690 is 96185193933138.

It is a super-2 number, since 2×831339391581690² (a number of 31 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 143264347 + ... + 148954193.

It is an arithmetic number, because the mean of its divisors is an integer number (16060665671424).

Almost surely, 2^{831339391581690} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 831339391581690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1027882602971136).

831339391581690 is an abundant number, since it is smaller than the sum of its proper divisors (1224425814360582).

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

831339391581690 is a wasteful number, since it uses less digits than its factorization.

831339391581690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5690684.

The product of its (nonzero) digits is 113374080, while the sum is 69.

The spelling of 831339391581690 in words is "eight hundred thirty-one trillion, three hundred thirty-nine billion, three hundred ninety-one million, five hundred eighty-one thousand, six hundred ninety".