68557536265 has 4 divisors (see below), whose sum is σ = 82269043524. Its totient is φ = 54846029008.

The previous prime is 68557536241. The next prime is 68557536317. The reversal of 68557536265 is 56263575586.

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 23007732489 + 45549803776 = 151683^2 + 213424^2 .

It is a cyclic number.

It is not a de Polignac number, because 68557536265 - 2¹⁷ = 68557405193 is a prime.

It is a Duffinian number.

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, 6855753622 + ... + 6855753631.

It is an arithmetic number, because the mean of its divisors is an integer number (20567260881).

Almost surely, 2^68557536265 is an apocalyptic number.

It is an amenable number.

68557536265 is a deficient number, since it is larger than the sum of its proper divisors (13711507259).

68557536265 is a wasteful number, since it uses less digits than its factorization.

68557536265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13711507258.

The product of its digits is 45360000, while the sum is 58.

The spelling of 68557536265 in words is "sixty-eight billion, five hundred fifty-seven million, five hundred thirty-six thousand, two hundred sixty-five".