36609820728 has 128 divisors (see below), whose sum is σ = 103167751680. Its totient is φ = 10741547520.

The previous prime is 36609820721. The next prime is 36609820733. The reversal of 36609820728 is 82702890663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36609820721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2367550 + ... + 2382962.

It is an arithmetic number, because the mean of its divisors is an integer number (805998060).

Almost surely, 2^36609820728 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 36609820728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51583875840).

36609820728 is an abundant number, since it is smaller than the sum of its proper divisors (66557930952).

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

36609820728 is a wasteful number, since it uses less digits than its factorization.

36609820728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15789 (or 15785 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 36609820728 in words is "thirty-six billion, six hundred nine million, eight hundred twenty thousand, seven hundred twenty-eight".