1165570220423 has 4 divisors (see below), whose sum is σ = 1332080251920. Its totient is φ = 999060188928.

The previous prime is 1165570220407. The next prime is 1165570220449. The reversal of 1165570220423 is 3240220755611.

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

It is a cyclic number.

It is not a de Polignac number, because 1165570220423 - 2⁴ = 1165570220407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165570220453) 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, 83255015738 + ... + 83255015751.

It is an arithmetic number, because the mean of its divisors is an integer number (333020062980).

Almost surely, 2^{1165570220423} is an apocalyptic number.

1165570220423 is a deficient number, since it is larger than the sum of its proper divisors (166510031497).

1165570220423 is an equidigital number, since it uses as much as digits as its factorization.

1165570220423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166510031496.

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 1165570220423 in words is "one trillion, one hundred sixty-five billion, five hundred seventy million, two hundred twenty thousand, four hundred twenty-three".