165059775999 has 32 divisors (see below), whose sum is σ = 251219672000. Its totient is φ = 107032689792.

The previous prime is 165059775997. The next prime is 165059776001. The reversal of 165059775999 is 999577950561.

It is an interprime number because it is at equal distance from previous prime (165059775997) and next prime (165059776001).

It is not a de Polignac number, because 165059775999 - 2¹ = 165059775997 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 (165059775997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3441717 + ... + 3489345.

It is an arithmetic number, because the mean of its divisors is an integer number (7850614750).

Almost surely, 2^165059775999 is an apocalyptic number.

165059775999 is a deficient number, since it is larger than the sum of its proper divisors (86159896001).

165059775999 is a wasteful number, since it uses less digits than its factorization.

165059775999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51144 (or 51138 counting only the distinct ones).

The product of its (nonzero) digits is 241116750, while the sum is 72.

It can be divided in two parts, 1650597 and 75999, that added together give a square (1726596 = 1314²).

The spelling of 165059775999 in words is "one hundred sixty-five billion, fifty-nine million, seven hundred seventy-five thousand, nine hundred ninety-nine".