12639823655 has 8 divisors (see below), whose sum is σ = 15172252992. Its totient is φ = 10108882528.

The previous prime is 12639823643. The next prime is 12639823661. The reversal of 12639823655 is 55632893621.

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 12639823655 - 2¹⁶ = 12639758119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353279 + ... + 387408.

It is an arithmetic number, because the mean of its divisors is an integer number (1896531624).

Almost surely, 2^12639823655 is an apocalyptic number.

12639823655 is a deficient number, since it is larger than the sum of its proper divisors (2532429337).

12639823655 is an equidigital number, since it uses as much as digits as its factorization.

12639823655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744105.

The product of its digits is 2332800, while the sum is 50.

The spelling of 12639823655 in words is "twelve billion, six hundred thirty-nine million, eight hundred twenty-three thousand, six hundred fifty-five".