68623538565 has 16 divisors (see below), whose sum is σ = 109803904128. Its totient is φ = 36597139776.

The previous prime is 68623538549. The next prime is 68623538567. The reversal of 68623538565 is 56583532686.

68623538565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 68623538565 - 2⁴ = 68623538549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68623538567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164032 + ... + 405158.

It is an arithmetic number, because the mean of its divisors is an integer number (6862744008).

Almost surely, 2^68623538565 is an apocalyptic number.

It is an amenable number.

68623538565 is a deficient number, since it is larger than the sum of its proper divisors (41180365563).

68623538565 is a wasteful number, since it uses less digits than its factorization.

68623538565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260108.

The product of its digits is 31104000, while the sum is 57.

The spelling of 68623538565 in words is "sixty-eight billion, six hundred twenty-three million, five hundred thirty-eight thousand, five hundred sixty-five".