6128645952865 has 4 divisors (see below), whose sum is σ = 7354375143444. Its totient is φ = 4902916762288.

The previous prime is 6128645952857. The next prime is 6128645952889. The reversal of 6128645952865 is 5682595468216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1887777073296 + 4240868879569 = 1373964^2 + 2059337^2 .

It is a cyclic number.

It is not a de Polignac number, because 6128645952865 - 2³ = 6128645952857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6128645952865.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 612864595282 + ... + 612864595291.

It is an arithmetic number, because the mean of its divisors is an integer number (1838593785861).

Almost surely, 2^{6128645952865} is an apocalyptic number.

It is an amenable number.

6128645952865 is a deficient number, since it is larger than the sum of its proper divisors (1225729190579).

6128645952865 is a wasteful number, since it uses less digits than its factorization.

6128645952865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225729190578.

The product of its digits is 248832000, while the sum is 67.

The spelling of 6128645952865 in words is "six trillion, one hundred twenty-eight billion, six hundred forty-five million, nine hundred fifty-two thousand, eight hundred sixty-five".