8221206495918 has 64 divisors (see below), whose sum is σ = 17884257011712. Its totient is φ = 2504314972800.

The previous prime is 8221206495917. The next prime is 8221206495919. The reversal of 8221206495918 is 8195946021228.

It is an interprime number because it is at equal distance from previous prime (8221206495917) and next prime (8221206495919).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8221206495917) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 92466921 + ... + 92555787.

It is an arithmetic number, because the mean of its divisors is an integer number (279441515808).

Almost surely, 2^{8221206495918} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8221206495918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8942128505856).

8221206495918 is an abundant number, since it is smaller than the sum of its proper divisors (9663050515794).

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

8221206495918 is a wasteful number, since it uses less digits than its factorization.

8221206495918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100729.

The product of its (nonzero) digits is 4976640, while the sum is 57.

The spelling of 8221206495918 in words is "eight trillion, two hundred twenty-one billion, two hundred six million, four hundred ninety-five thousand, nine hundred eighteen".