164397220418 has 6 divisors (see below), whose sum is σ = 246596690739. Its totient is φ = 82198323506.

The previous prime is 164397220417. The next prime is 164397220469. The reversal of 164397220418 is 814022793461.

It can be written as a sum of positive squares in only one way, i.e., 82198610209 + 82198610209 = 286703^2 + 286703^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=286703.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164397220411) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 430055 + ... + 716757.

Almost surely, 2^164397220418 is an apocalyptic number.

164397220418 is a deficient number, since it is larger than the sum of its proper divisors (82199470321).

164397220418 is an frugal number, since it uses more digits than its factorization.

164397220418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573408 (or 286705 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 164397220418 in words is "one hundred sixty-four billion, three hundred ninety-seven million, two hundred twenty thousand, four hundred eighteen".