165370403255 has 4 divisors (see below), whose sum is σ = 198444483912. Its totient is φ = 132296322600.

The previous prime is 165370403249. The next prime is 165370403299. The reversal of 165370403255 is 552304073561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 552304073561 = 211 ⋅2617554851.

It is not a de Polignac number, because 165370403255 - 2³² = 161075435959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16537040321 + ... + 16537040330.

It is an arithmetic number, because the mean of its divisors is an integer number (49611120978).

Almost surely, 2^165370403255 is an apocalyptic number.

165370403255 is a deficient number, since it is larger than the sum of its proper divisors (33074080657).

165370403255 is an equidigital number, since it uses as much as digits as its factorization.

165370403255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33074080656.

The product of its (nonzero) digits is 378000, while the sum is 41.

The spelling of 165370403255 in words is "one hundred sixty-five billion, three hundred seventy million, four hundred three thousand, two hundred fifty-five".