36003781836 has 216 divisors, whose sum is σ = 103064113152. Its totient is φ = 10583496000.

The previous prime is 36003781813. The next prime is 36003781897. The reversal of 36003781836 is 63818730063.

36003781836 is a `hidden beast` number, since 3 + 600 + 3 + 7 + 8 + 1 + 8 + 36 = 666.

36003781836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 36003781791 and 36003781800.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 31279861 + ... + 31281011.

It is an arithmetic number, because the mean of its divisors is an integer number (477148672).

Almost surely, 2^36003781836 is an apocalyptic number.

36003781836 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 36003781836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51532056576).

36003781836 is an abundant number, since it is smaller than the sum of its proper divisors (67060331316).

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

36003781836 is a wasteful number, since it uses less digits than its factorization.

36003781836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393 (or 1377 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 36003781836 in words is "thirty-six billion, three million, seven hundred eighty-one thousand, eight hundred thirty-six".