165050561601061 has 4 divisors (see below), whose sum is σ = 165051544698412. Its totient is φ = 165049578503712.

The previous prime is 165050561601041. The next prime is 165050561601097. The reversal of 165050561601061 is 160106165050561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66593662324036 + 98456899277025 = 8160494^2 + 9922545^2 .

It is a cyclic number.

It is not a de Polignac number, because 165050561601061 - 2³⁹ = 164500805787173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165050561600999 and 165050561601017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165050561601041) 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, 491296800 + ... + 491632633.

It is an arithmetic number, because the mean of its divisors is an integer number (41262886174603).

Almost surely, 2^{165050561601061} is an apocalyptic number.

It is an amenable number.

165050561601061 is a deficient number, since it is larger than the sum of its proper divisors (983097351).

165050561601061 is an equidigital number, since it uses as much as digits as its factorization.

165050561601061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983097350.

The product of its (nonzero) digits is 162000, while the sum is 43.

The spelling of 165050561601061 in words is "one hundred sixty-five trillion, fifty billion, five hundred sixty-one million, six hundred one thousand, sixty-one".