818628446220 has 192 divisors, whose sum is σ = 2624407962624. Its totient is φ = 189110338560.

The previous prime is 818628446191. The next prime is 818628446257. The reversal of 818628446220 is 22644826818.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 520335 + ... + 1381305.

It is an arithmetic number, because the mean of its divisors is an integer number (13668791472).

Almost surely, 2^818628446220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 818628446220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1312203981312).

818628446220 is an abundant number, since it is smaller than the sum of its proper divisors (1805779516404).

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

818628446220 is a wasteful number, since it uses less digits than its factorization.

818628446220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861072 (or 861070 counting only the distinct ones).

The product of its (nonzero) digits is 2359296, while the sum is 51.

The spelling of 818628446220 in words is "eight hundred eighteen billion, six hundred twenty-eight million, four hundred forty-six thousand, two hundred twenty".