165050505550601 has 12 divisors (see below), whose sum is σ = 187271381402112. Its totient is φ = 145205723355000.

The previous prime is 165050505550561. The next prime is 165050505550621. The reversal of 165050505550601 is 106055505050561.

It is not a de Polignac number, because 165050505550601 - 2¹⁰ = 165050505549577 is a prime.

It is a super-2 number, since 2×165050505550601² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (165050505550621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22000863425 + ... + 22000870926.

It is an arithmetic number, because the mean of its divisors is an integer number (15605948450176).

Almost surely, 2^{165050505550601} is an apocalyptic number.

165050505550601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

165050505550601 is a deficient number, since it is larger than the sum of its proper divisors (22220875851511).

165050505550601 is a wasteful number, since it uses less digits than its factorization.

165050505550601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44001734404 (or 44001734393 counting only the distinct ones).

The product of its (nonzero) digits is 562500, while the sum is 44.

The spelling of 165050505550601 in words is "one hundred sixty-five trillion, fifty billion, five hundred five million, five hundred fifty thousand, six hundred one".