11570885509 has 4 divisors (see below), whose sum is σ = 11571249420. Its totient is φ = 11570521600.

The previous prime is 11570885503. The next prime is 11570885587. The reversal of 11570885509 is 90558807511.

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 7114922500 + 4455963009 = 84350^2 + 66753^2 .

It is a cyclic number.

It is not a de Polignac number, because 11570885509 - 2¹¹ = 11570883461 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 (11570885503) 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, 129154 + ... + 199555.

It is an arithmetic number, because the mean of its divisors is an integer number (2892812355).

Almost surely, 2^11570885509 is an apocalyptic number.

It is an amenable number.

11570885509 is a deficient number, since it is larger than the sum of its proper divisors (363911).

11570885509 is an equidigital number, since it uses as much as digits as its factorization.

11570885509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363910.

The product of its (nonzero) digits is 504000, while the sum is 49.

The spelling of 11570885509 in words is "eleven billion, five hundred seventy million, eight hundred eighty-five thousand, five hundred nine".