164255268557 has 4 divisors (see below), whose sum is σ = 173917343196. Its totient is φ = 154593193920.

The previous prime is 164255268539. The next prime is 164255268559. The reversal of 164255268557 is 755862552461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 755862552461 = 69899 ⋅10813639.

It can be written as a sum of positive squares in 2 ways, for example, as 53678402596 + 110576865961 = 231686^2 + 332531^2 .

It is a cyclic number.

It is not a de Polignac number, because 164255268557 - 2¹⁴ = 164255252173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164255268559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4831037294 + ... + 4831037327.

It is an arithmetic number, because the mean of its divisors is an integer number (43479335799).

Almost surely, 2^164255268557 is an apocalyptic number.

164255268557 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

164255268557 is a deficient number, since it is larger than the sum of its proper divisors (9662074639).

164255268557 is an equidigital number, since it uses as much as digits as its factorization.

164255268557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9662074638.

The product of its digits is 20160000, while the sum is 56.

The spelling of 164255268557 in words is "one hundred sixty-four billion, two hundred fifty-five million, two hundred sixty-eight thousand, five hundred fifty-seven".