164318236820 has 12 divisors (see below), whose sum is σ = 345068297364. Its totient is φ = 65727294720.

The previous prime is 164318236811. The next prime is 164318236913. The reversal of 164318236820 is 28632813461.

It can be written as a sum of positive squares in 2 ways, for example, as 40595802256 + 123722434564 = 201484^2 + 351742^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4107955901 + ... + 4107955940.

It is an arithmetic number, because the mean of its divisors is an integer number (28755691447).

Almost surely, 2^164318236820 is an apocalyptic number.

164318236820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164318236820 is an abundant number, since it is smaller than the sum of its proper divisors (180750060544).

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

164318236820 is a wasteful number, since it uses less digits than its factorization.

164318236820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8215911850 (or 8215911848 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 44.

The spelling of 164318236820 in words is "one hundred sixty-four billion, three hundred eighteen million, two hundred thirty-six thousand, eight hundred twenty".