12987793643 has 8 divisors (see below), whose sum is σ = 14300919360. Its totient is φ = 11696737480.

The previous prime is 12987793633. The next prime is 12987793649. The reversal of 12987793643 is 34639778921.

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 12987793643 - 2¹² = 12987789547 is a prime.

It is a super-2 number, since 2×12987793643² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12987793649) 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, 5516153 + ... + 5518506.

It is an arithmetic number, because the mean of its divisors is an integer number (1787614920).

Almost surely, 2^12987793643 is an apocalyptic number.

12987793643 is a deficient number, since it is larger than the sum of its proper divisors (1313125717).

12987793643 is a wasteful number, since it uses less digits than its factorization.

12987793643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11034777.

The product of its digits is 13716864, while the sum is 59.

The spelling of 12987793643 in words is "twelve billion, nine hundred eighty-seven million, seven hundred ninety-three thousand, six hundred forty-three".