36646861218 has 32 divisors (see below), whose sum is σ = 80017597440. Its totient is φ = 11096663760.

The previous prime is 36646861213. The next prime is 36646861231. The reversal of 36646861218 is 81216864663.

It is not an unprimeable number, because it can be changed into a prime (36646861213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123430 + ... + 297537.

It is an arithmetic number, because the mean of its divisors is an integer number (2500549920).

Almost surely, 2^36646861218 is an apocalyptic number.

36646861218 is an abundant number, since it is smaller than the sum of its proper divisors (43370736222).

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

36646861218 is a wasteful number, since it uses less digits than its factorization.

36646861218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422302.

The product of its digits is 1990656, while the sum is 51.

The spelling of 36646861218 in words is "thirty-six billion, six hundred forty-six million, eight hundred sixty-one thousand, two hundred eighteen".