12395927569 has 3 divisors (see below), whose sum is σ = 12396038907. Its totient is φ = 12395816232.

The previous prime is 12395927567. The next prime is 12395927581. The reversal of 12395927569 is 96572959321.

The square root of 12395927569 is 111337.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 4881118225 + 7514809344 = 69865^2 + 86688^2 .

It is not a de Polignac number, because 12395927569 - 2¹ = 12395927567 is a prime.

It is a super-4 number, since 4×12395927569⁴ (a number of 41 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12395927567) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 55669 + ... + 167005.

It is an arithmetic number, because the mean of its divisors is an integer number (4132012969).

Almost surely, 2^12395927569 is an apocalyptic number.

12395927569 is the 111337-th square number.

12395927569 is the 55669-th centered octagonal number.

It is an amenable number.

12395927569 is a deficient number, since it is larger than the sum of its proper divisors (111338).

12395927569 is an frugal number, since it uses more digits than its factorization.

12395927569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222674 (or 111337 counting only the distinct ones).

The product of its digits is 9185400, while the sum is 58.

The spelling of 12395927569 in words is "twelve billion, three hundred ninety-five million, nine hundred twenty-seven thousand, five hundred sixty-nine".