165145661444033 has 16 divisors (see below), whose sum is σ = 174069441829440. Its totient is φ = 156245191833600.

The previous prime is 165145661443949. The next prime is 165145661444119. The reversal of 165145661444033 is 330444166541561.

It is a cyclic number.

It is not a de Polignac number, because 165145661444033 - 2¹⁶ = 165145661378497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165145661344033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47747873 + ... + 51089633.

It is an arithmetic number, because the mean of its divisors is an integer number (10879340114340).

Almost surely, 2^{165145661444033} is an apocalyptic number.

It is an amenable number.

165145661444033 is a deficient number, since it is larger than the sum of its proper divisors (8923780385407).

165145661444033 is a wasteful number, since it uses less digits than its factorization.

165145661444033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3345248.

The product of its (nonzero) digits is 12441600, while the sum is 53.

The spelling of 165145661444033 in words is "one hundred sixty-five trillion, one hundred forty-five billion, six hundred sixty-one million, four hundred forty-four thousand, thirty-three".