835535858136 has 128 divisors (see below), whose sum is σ = 2432836684800. Its totient is φ = 234167431680.

The previous prime is 835535857991. The next prime is 835535858243. The reversal of 835535858136 is 631858535538.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 835535858136.

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, 56185710 + ... + 56200578.

It is an arithmetic number, because the mean of its divisors is an integer number (19006536600).

Almost surely, 2^835535858136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 835535858136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1216418342400).

835535858136 is an abundant number, since it is smaller than the sum of its proper divisors (1597300826664).

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

835535858136 is a wasteful number, since it uses less digits than its factorization.

835535858136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21249 (or 21245 counting only the distinct ones).

The product of its digits is 51840000, while the sum is 60.

The spelling of 835535858136 in words is "eight hundred thirty-five billion, five hundred thirty-five million, eight hundred fifty-eight thousand, one hundred thirty-six".