164894884310565 has 12 divisors (see below), whose sum is σ = 285817799471724. Its totient is φ = 87943938298944.

The previous prime is 164894884310557. The next prime is 164894884310579. The reversal of 164894884310565 is 565013488498461.

164894884310565 is a `hidden beast` number, since 1 + 6 + 4 + 8 + 9 + 4 + 8 + 8 + 43 + 10 + 565 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17899677101601 + 146995207208964 = 4230801^2 + 12124158^2 .

It is not a de Polignac number, because 164894884310565 - 2³ = 164894884310557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 164894884310493 and 164894884310502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1832165381184 + ... + 1832165381273.

It is an arithmetic number, because the mean of its divisors is an integer number (23818149955977).

Almost surely, 2^{164894884310565} is an apocalyptic number.

164894884310565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164894884310565 is a deficient number, since it is larger than the sum of its proper divisors (120922915161159).

164894884310565 is a wasteful number, since it uses less digits than its factorization.

164894884310565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3664330762468 (or 3664330762465 counting only the distinct ones).

The product of its (nonzero) digits is 796262400, while the sum is 72.

The spelling of 164894884310565 in words is "one hundred sixty-four trillion, eight hundred ninety-four billion, eight hundred eighty-four million, three hundred ten thousand, five hundred sixty-five".