244642638687 has 8 divisors (see below), whose sum is σ = 326212846080. Its totient is φ = 163083761880.

The previous prime is 244642638671. The next prime is 244642638697. The reversal of 244642638687 is 786836246442.

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

It is not a de Polignac number, because 244642638687 - 2⁴ = 244642638671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 244642638687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244642638697) 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, 2782137 + ... + 2868722.

It is an arithmetic number, because the mean of its divisors is an integer number (40776605760).

Almost surely, 2^244642638687 is an apocalyptic number.

244642638687 is a deficient number, since it is larger than the sum of its proper divisors (81570207393).

244642638687 is a wasteful number, since it uses less digits than its factorization.

244642638687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5665293.

The product of its digits is 74317824, while the sum is 60.

The spelling of 244642638687 in words is "two hundred forty-four billion, six hundred forty-two million, six hundred thirty-eight thousand, six hundred eighty-seven".