164828692081 has 3 divisors (see below), whose sum is σ = 164829098073. Its totient is φ = 164828286090.

The previous prime is 164828692057. The next prime is 164828692141. The reversal of 164828692081 is 180296828461.

The square root of 164828692081 is 405991.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 164828692081 - 2³⁷ = 27389738609 is a prime.

It is a super-2 number, since 2×164828692081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164828692031) 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, 202996 + ... + 608986.

It is an arithmetic number, because the mean of its divisors is an integer number (54943032691).

Almost surely, 2^164828692081 is an apocalyptic number.

164828692081 is the 405991-st square number.

164828692081 is the 202996-th centered octagonal number.

It is an amenable number.

164828692081 is a deficient number, since it is larger than the sum of its proper divisors (405992).

164828692081 is an frugal number, since it uses more digits than its factorization.

164828692081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811982 (or 405991 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 55.

The spelling of 164828692081 in words is "one hundred sixty-four billion, eight hundred twenty-eight million, six hundred ninety-two thousand, eighty-one".