36818308581 has 16 divisors (see below), whose sum is σ = 49720623360. Its totient is φ = 24230868480.

The previous prime is 36818308573. The next prime is 36818308591. The reversal of 36818308581 is 18580381863.

It is not a de Polignac number, because 36818308581 - 2³ = 36818308573 is a prime.

It is a super-2 number, since 2×36818308581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36818308511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2408121 + ... + 2423361.

It is an arithmetic number, because the mean of its divisors is an integer number (3107538960).

Almost surely, 2^36818308581 is an apocalyptic number.

It is an amenable number.

36818308581 is a deficient number, since it is larger than the sum of its proper divisors (12902314779).

36818308581 is a wasteful number, since it uses less digits than its factorization.

36818308581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25516.

The product of its (nonzero) digits is 1105920, while the sum is 51.

The spelling of 36818308581 in words is "thirty-six billion, eight hundred eighteen million, three hundred eight thousand, five hundred eighty-one".