36400081800 has 96 divisors (see below), whose sum is σ = 113057808480. Its totient is φ = 9687974400.

The previous prime is 36400081771. The next prime is 36400081813. The reversal of 36400081800 is 818000463.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 254379 + ... + 370821.

It is an arithmetic number, because the mean of its divisors is an integer number (1177685505).

Almost surely, 2^36400081800 is an apocalyptic number.

36400081800 is a gapful number since it is divisible by the number (30) 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 36400081800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56528904240).

36400081800 is an abundant number, since it is smaller than the sum of its proper divisors (76657726680).

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

36400081800 is a wasteful number, since it uses less digits than its factorization.

36400081800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116983 (or 116974 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The spelling of 36400081800 in words is "thirty-six billion, four hundred million, eighty-one thousand, eight hundred".