12975578569 has 4 divisors (see below), whose sum is σ = 13008263044. Its totient is φ = 12942894096.

The previous prime is 12975578549. The next prime is 12975578611. The reversal of 12975578569 is 96587557921.

It is a happy number.

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 10087590969 + 2887987600 = 100437^2 + 53740^2 .

It is a cyclic number.

It is not a de Polignac number, because 12975578569 - 2⁵ = 12975578537 is a prime.

It is a super-2 number, since 2×12975578569² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12975578569.

It is not an unprimeable number, because it can be changed into a prime (12975578509) 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, 16341642 + ... + 16342435.

It is an arithmetic number, because the mean of its divisors is an integer number (3252065761).

Almost surely, 2^12975578569 is an apocalyptic number.

It is an amenable number.

12975578569 is a deficient number, since it is larger than the sum of its proper divisors (32684475).

12975578569 is an equidigital number, since it uses as much as digits as its factorization.

12975578569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32684474.

The product of its digits is 47628000, while the sum is 64.

The spelling of 12975578569 in words is "twelve billion, nine hundred seventy-five million, five hundred seventy-eight thousand, five hundred sixty-nine".