164212510220 has 48 divisors (see below), whose sum is σ = 377115933600. Its totient is φ = 59567608320.

The previous prime is 164212510201. The next prime is 164212510223. The reversal of 164212510220 is 22015212461.

It is a self number, because there is not a number n which added to its sum of digits gives 164212510220.

It is not an unprimeable number, because it can be changed into a prime (164212510223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 822515 + ... + 1002474.

It is an arithmetic number, because the mean of its divisors is an integer number (7856581950).

Almost surely, 2^164212510220 is an apocalyptic number.

164212510220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164212510220 is an abundant number, since it is smaller than the sum of its proper divisors (212903423380).

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

164212510220 is a wasteful number, since it uses less digits than its factorization.

164212510220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825418 (or 1825416 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 164212510220 its reverse (22015212461), we get a palindrome (186227722681).

The spelling of 164212510220 in words is "one hundred sixty-four billion, two hundred twelve million, five hundred ten thousand, two hundred twenty".