1165570220443 has 4 divisors (see below), whose sum is σ = 1205762297040. Its totient is φ = 1125378143848.

The previous prime is 1165570220407. The next prime is 1165570220449. The reversal of 1165570220443 is 3440220755611.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1165570220443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1165570220396 and 1165570220405.

It is not an unprimeable number, because it can be changed into a prime (1165570220449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20096038255 + ... + 20096038312.

It is an arithmetic number, because the mean of its divisors is an integer number (301440574260).

Almost surely, 2^{1165570220443} is an apocalyptic number.

1165570220443 is a deficient number, since it is larger than the sum of its proper divisors (40192076597).

1165570220443 is an equidigital number, since it uses as much as digits as its factorization.

1165570220443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40192076596.

The product of its (nonzero) digits is 201600, while the sum is 40.

The spelling of 1165570220443 in words is "one trillion, one hundred sixty-five billion, five hundred seventy million, two hundred twenty thousand, four hundred forty-three".