12651387639 has 8 divisors (see below), whose sum is σ = 18402018432. Its totient is φ = 7667507640.

The previous prime is 12651387601. The next prime is 12651387653. The reversal of 12651387639 is 93678315621.

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

It is not a de Polignac number, because 12651387639 - 2¹² = 12651383543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12651387591 and 12651387600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12651387439) 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, 191687659 + ... + 191687724.

It is an arithmetic number, because the mean of its divisors is an integer number (2300252304).

Almost surely, 2^12651387639 is an apocalyptic number.

12651387639 is a deficient number, since it is larger than the sum of its proper divisors (5750630793).

12651387639 is a wasteful number, since it uses less digits than its factorization.

12651387639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383375397.

The product of its digits is 1632960, while the sum is 51.

The spelling of 12651387639 in words is "twelve billion, six hundred fifty-one million, three hundred eighty-seven thousand, six hundred thirty-nine".