164326838391 has 6 divisors (see below), whose sum is σ = 237360988800. Its totient is φ = 109551225588.

The previous prime is 164326838369. The next prime is 164326838437. The reversal of 164326838391 is 193838623461.

164326838391 is a `hidden beast` number, since 164 + 3 + 2 + 68 + 38 + 391 = 666.

It is not a de Polignac number, because 164326838391 - 2¹⁵ = 164326805623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164326838311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9129268791 + ... + 9129268808.

It is an arithmetic number, because the mean of its divisors is an integer number (39560164800).

Almost surely, 2^164326838391 is an apocalyptic number.

164326838391 is a deficient number, since it is larger than the sum of its proper divisors (73034150409).

164326838391 is a wasteful number, since it uses less digits than its factorization.

164326838391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18258537605 (or 18258537602 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The spelling of 164326838391 in words is "one hundred sixty-four billion, three hundred twenty-six million, eight hundred thirty-eight thousand, three hundred ninety-one".