6638775258345 has 8 divisors (see below), whose sum is σ = 10622040413376. Its totient is φ = 3540680137776.

The previous prime is 6638775258331. The next prime is 6638775258361. The reversal of 6638775258345 is 5438525778366.

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

It is not a de Polignac number, because 6638775258345 - 2⁹ = 6638775257833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6638775258345.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221292508597 + ... + 221292508626.

It is an arithmetic number, because the mean of its divisors is an integer number (1327755051672).

Almost surely, 2^{6638775258345} is an apocalyptic number.

It is an amenable number.

6638775258345 is a deficient number, since it is larger than the sum of its proper divisors (3983265155031).

6638775258345 is a wasteful number, since it uses less digits than its factorization.

6638775258345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442585017231.

The product of its digits is 1016064000, while the sum is 69.

The spelling of 6638775258345 in words is "six trillion, six hundred thirty-eight billion, seven hundred seventy-five million, two hundred fifty-eight thousand, three hundred forty-five".