12689569446 has 16 divisors (see below), whose sum is σ = 25389126000. Its totient is φ = 4228191968.

The previous prime is 12689569421. The next prime is 12689569507. The reversal of 12689569446 is 64496598621.

It is a super-2 number, since 2×12689569446² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 12689569446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399561 + ... + 430148.

It is an arithmetic number, because the mean of its divisors is an integer number (1586820375).

Almost surely, 2^12689569446 is an apocalyptic number.

12689569446 is an abundant number, since it is smaller than the sum of its proper divisors (12699556554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12689569446 is a wasteful number, since it uses less digits than its factorization.

12689569446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832263.

The product of its digits is 22394880, while the sum is 60.

The spelling of 12689569446 in words is "twelve billion, six hundred eighty-nine million, five hundred sixty-nine thousand, four hundred forty-six".