83644365018 has 32 divisors (see below), whose sum is σ = 174722109120. Its totient is φ = 26668103040.

The previous prime is 83644364897. The next prime is 83644365023. The reversal of 83644365018 is 81056344638.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3179923 + ... + 3206118.

It is an arithmetic number, because the mean of its divisors is an integer number (5460065910).

Almost surely, 2^83644365018 is an apocalyptic number.

83644365018 is an abundant number, since it is smaller than the sum of its proper divisors (91077744102).

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

83644365018 is a wasteful number, since it uses less digits than its factorization.

83644365018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6386142.

The product of its (nonzero) digits is 1658880, while the sum is 48.

The spelling of 83644365018 in words is "eighty-three billion, six hundred forty-four million, three hundred sixty-five thousand, eighteen".