831747747138 has 256 divisors, whose sum is σ = 2161317150720. Its totient is φ = 207153676800.

The previous prime is 831747747053. The next prime is 831747747157.

It is a happy number.

831747747138 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 271191081 + ... + 271194147.

It is an arithmetic number, because the mean of its divisors is an integer number (8442645120).

Almost surely, 2^831747747138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 831747747138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1080658575360).

831747747138 is an abundant number, since it is smaller than the sum of its proper divisors (1329569403582).

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

831747747138 is a wasteful number, since it uses less digits than its factorization.

831747747138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3373.

The product of its digits is 22127616, while the sum is 60.

The spelling of 831747747138 in words is "eight hundred thirty-one billion, seven hundred forty-seven million, seven hundred forty-seven thousand, one hundred thirty-eight".