68736563 has 12 divisors (see below), whose sum is σ = 80149752. Its totient is φ = 58776480.

The previous prime is 68736553. The next prime is 68736571. The reversal of 68736563 is 36563786.

It is not a de Polignac number, because 68736563 - 2²⁰ = 67687987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68736523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22631 + ... + 25487.

It is an arithmetic number, because the mean of its divisors is an integer number (6679146).

Almost surely, 2^68736563 is an apocalyptic number.

68736563 is a deficient number, since it is larger than the sum of its proper divisors (11413189).

68736563 is a wasteful number, since it uses less digits than its factorization.

68736563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3362 (or 3355 counting only the distinct ones).

The product of its digits is 544320, while the sum is 44.

The square root of 68736563 is about 8290.7516547054. The cubic root of 68736563 is about 409.6339445434.

The spelling of 68736563 in words is "sixty-eight million, seven hundred thirty-six thousand, five hundred sixty-three".