12689576945 has 8 divisors (see below), whose sum is σ = 15228573480. Its totient is φ = 10150940800.

The previous prime is 12689576941. The next prime is 12689576981. The reversal of 12689576945 is 54967598621.

It can be written as a sum of positive squares in 4 ways, for example, as 4560571024 + 8129005921 = 67532^2 + 90161^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12689576945 - 2² = 12689576941 is a prime.

It is a super-2 number, since 2×12689576945² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12689576941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5390 + ... + 159399.

It is an arithmetic number, because the mean of its divisors is an integer number (1903571685).

Almost surely, 2^12689576945 is an apocalyptic number.

It is an amenable number.

12689576945 is a deficient number, since it is larger than the sum of its proper divisors (2538996535).

12689576945 is a wasteful number, since it uses less digits than its factorization.

12689576945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180195.

The product of its digits is 32659200, while the sum is 62.

The spelling of 12689576945 in words is "twelve billion, six hundred eighty-nine million, five hundred seventy-six thousand, nine hundred forty-five".