165266436252123 has 56 divisors (see below), whose sum is σ = 249822787697280. Its totient is φ = 109275779635200.

The previous prime is 165266436252109. The next prime is 165266436252161. The reversal of 165266436252123 is 321252634662561.

165266436252123 is a `hidden beast` number, since 1 + 6 + 5 + 2 + 6 + 6 + 4 + 3 + 625 + 2 + 1 + 2 + 3 = 666.

It is not a de Polignac number, because 165266436252123 - 2¹⁴ = 165266436235739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165266436252123.

It is not an unprimeable number, because it can be changed into a prime (165266436252023) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 41840923 + ... + 45620123.

It is an arithmetic number, because the mean of its divisors is an integer number (4461121208880).

Almost surely, 2^{165266436252123} is an apocalyptic number.

165266436252123 is a deficient number, since it is larger than the sum of its proper divisors (84556351445157).

165266436252123 is an equidigital number, since it uses as much as digits as its factorization.

165266436252123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3779711 (or 3779696 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 54.

The spelling of 165266436252123 in words is "one hundred sixty-five trillion, two hundred sixty-six billion, four hundred thirty-six million, two hundred fifty-two thousand, one hundred twenty-three".