11556970869 has 4 divisors (see below), whose sum is σ = 15409294496. Its totient is φ = 7704647244.

The previous prime is 11556970861. The next prime is 11556970897. The reversal of 11556970869 is 96807965511.

11556970869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11556970869 - 2³ = 11556970861 is a prime.

It is a super-2 number, since 2×11556970869² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11556970861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1926161809 + ... + 1926161814.

It is an arithmetic number, because the mean of its divisors is an integer number (3852323624).

Almost surely, 2^11556970869 is an apocalyptic number.

It is an amenable number.

11556970869 is a deficient number, since it is larger than the sum of its proper divisors (3852323627).

11556970869 is an equidigital number, since it uses as much as digits as its factorization.

11556970869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3852323626.

The product of its (nonzero) digits is 4082400, while the sum is 57.

The spelling of 11556970869 in words is "eleven billion, five hundred fifty-six million, nine hundred seventy thousand, eight hundred sixty-nine".