12609831845 has 16 divisors (see below), whose sum is σ = 16302247920. Its totient is φ = 9308181504.

The previous prime is 12609831827. The next prime is 12609831847. The reversal of 12609831845 is 54813890621.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 3463204801 + 9146627044 = 58849^2 + 95638^2 .

It is a cyclic number.

It is not a de Polignac number, because 12609831845 - 2⁶ = 12609831781 is a prime.

It is a super-2 number, since 2×12609831845² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12609831845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12609831847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132407 + ... + 206763.

It is an arithmetic number, because the mean of its divisors is an integer number (1018890495).

Almost surely, 2^12609831845 is an apocalyptic number.

It is an amenable number.

12609831845 is a deficient number, since it is larger than the sum of its proper divisors (3692416075).

12609831845 is a wasteful number, since it uses less digits than its factorization.

12609831845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76984.

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 12609831845 in words is "twelve billion, six hundred nine million, eight hundred thirty-one thousand, eight hundred forty-five".