165655015001 has 4 divisors (see below), whose sum is σ = 189320017152. Its totient is φ = 141990012852.

The previous prime is 165655014977. The next prime is 165655015027. The reversal of 165655015001 is 100510556561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 100510556561 = 21841 ⋅4601921.

It is a cyclic number.

It is not a de Polignac number, because 165655015001 - 2¹⁰ = 165655013977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165655015091) 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, 11832501065 + ... + 11832501078.

It is an arithmetic number, because the mean of its divisors is an integer number (47330004288).

Almost surely, 2^165655015001 is an apocalyptic number.

It is an amenable number.

165655015001 is a deficient number, since it is larger than the sum of its proper divisors (23665002151).

165655015001 is an equidigital number, since it uses as much as digits as its factorization.

165655015001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23665002150.

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 165655015001 in words is "one hundred sixty-five billion, six hundred fifty-five million, fifteen thousand, one".