12694544639 has 16 divisors (see below), whose sum is σ = 14656368960. Its totient is φ = 10770063360.

The previous prime is 12694544633. The next prime is 12694544659. The reversal of 12694544639 is 93644549621.

It is not a de Polignac number, because 12694544639 - 2¹⁶ = 12694479103 is a prime.

It is a super-3 number, since 3×12694544639³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12694544633) 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, 591407 + ... + 612495.

It is an arithmetic number, because the mean of its divisors is an integer number (916023060).

Almost surely, 2^12694544639 is an apocalyptic number.

12694544639 is a deficient number, since it is larger than the sum of its proper divisors (1961824321).

12694544639 is a wasteful number, since it uses less digits than its factorization.

12694544639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21970.

The product of its digits is 5598720, while the sum is 53.

The spelling of 12694544639 in words is "twelve billion, six hundred ninety-four million, five hundred forty-four thousand, six hundred thirty-nine".