12637544845 has 8 divisors (see below), whose sum is σ = 15172163064. Its totient is φ = 10105296384.

The previous prime is 12637544839. The next prime is 12637544849. The reversal of 12637544845 is 54844573621.

It can be written as a sum of positive squares in 4 ways, for example, as 1129833769 + 11507711076 = 33613^2 + 107274^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12637544845 - 2¹⁷ = 12637413773 is a prime.

It is a super-3 number, since 3×12637544845³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12637544849) 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, 580684 + ... + 602053.

It is an arithmetic number, because the mean of its divisors is an integer number (1896520383).

Almost surely, 2^12637544845 is an apocalyptic number.

It is an amenable number.

12637544845 is a deficient number, since it is larger than the sum of its proper divisors (2534618219).

12637544845 is a wasteful number, since it uses less digits than its factorization.

12637544845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184879.

The product of its digits is 3225600, while the sum is 49.

The spelling of 12637544845 in words is "twelve billion, six hundred thirty-seven million, five hundred forty-four thousand, eight hundred forty-five".