220378158610818 has 128 divisors (see below), whose sum is σ = 519478903722240. Its totient is φ = 61709728849920.

The previous prime is 220378158610711. The next prime is 220378158610847. The reversal of 220378158610818 is 818016851873022.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18317155 + ... + 27861702.

It is an arithmetic number, because the mean of its divisors is an integer number (4058428935330).

Almost surely, 2^{220378158610818} is an apocalyptic number.

220378158610818 is an abundant number, since it is smaller than the sum of its proper divisors (299100745111422).

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

220378158610818 is a wasteful number, since it uses less digits than its factorization.

220378158610818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46179012.

The product of its (nonzero) digits is 10321920, while the sum is 60.

The spelling of 220378158610818 in words is "two hundred twenty trillion, three hundred seventy-eight billion, one hundred fifty-eight million, six hundred ten thousand, eight hundred eighteen".