44157217218 has 64 divisors (see below), whose sum is σ = 91009699200. Its totient is φ = 14274455040.

The previous prime is 44157217213. The next prime is 44157217219. The reversal of 44157217218 is 81271275144.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 44157217218.

It is not an unprimeable number, because it can be changed into a prime (44157217213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53265228 + ... + 53266056.

It is an arithmetic number, because the mean of its divisors is an integer number (1422026550).

Almost surely, 2^44157217218 is an apocalyptic number.

44157217218 is an abundant number, since it is smaller than the sum of its proper divisors (46852481982).

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

44157217218 is a wasteful number, since it uses less digits than its factorization.

44157217218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1907.

The product of its digits is 125440, while the sum is 42.

The spelling of 44157217218 in words is "forty-four billion, one hundred fifty-seven million, two hundred seventeen thousand, two hundred eighteen".