320655500220 has 96 divisors (see below), whose sum is σ = 988442864640. Its totient is φ = 77021487360.

The previous prime is 320655500183. The next prime is 320655500239. The reversal of 320655500220 is 22005556023.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

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, 2156692 + ... + 2300571.

It is an arithmetic number, because the mean of its divisors is an integer number (10296279840).

Almost surely, 2^320655500220 is an apocalyptic number.

320655500220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320655500220 is an abundant number, since it is smaller than the sum of its proper divisors (667787364420).

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

320655500220 is a wasteful number, since it uses less digits than its factorization.

320655500220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4457395 (or 4457393 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

The spelling of 320655500220 in words is "three hundred twenty billion, six hundred fifty-five million, five hundred thousand, two hundred twenty".