4441156165 has 4 divisors (see below), whose sum is σ = 5329387404. Its totient is φ = 3552924928.

The previous prime is 4441156141. The next prime is 4441156201. The reversal of 4441156165 is 5616511444.

It is a Cunningham number, because it is equal to 66642²+1.

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 1598880196 + 2842275969 = 39986^2 + 53313^2 .

It is a cyclic number.

It is not a de Polignac number, because 4441156165 - 2¹⁷ = 4441025093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 444115612 + ... + 444115621.

It is an arithmetic number, because the mean of its divisors is an integer number (1332346851).

Almost surely, 2^4441156165 is an apocalyptic number.

It is an amenable number.

4441156165 is a deficient number, since it is larger than the sum of its proper divisors (888231239).

4441156165 is an equidigital number, since it uses as much as digits as its factorization.

4441156165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888231238.

The product of its digits is 57600, while the sum is 37.

The square root of 4441156165 is about 66642.0000075028. Note that the first 5 decimals coincide. The cubic root of 4441156165 is about 1643.7358031226.

It can be divided in two parts, 44411 and 56165, that added together give a triangular number (100576 = T₄₄₈).

The spelling of 4441156165 in words is "four billion, four hundred forty-one million, one hundred fifty-six thousand, one hundred sixty-five".