68812563 has 16 divisors (see below), whose sum is σ = 97483680. Its totient is φ = 43094016.

The previous prime is 68812543. The next prime is 68812577. The reversal of 68812563 is 36521886.

It is a happy number.

It is not a de Polignac number, because 68812563 - 2⁵ = 68812531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68812543) 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, 7470 + ... + 13907.

It is an arithmetic number, because the mean of its divisors is an integer number (6092730).

Almost surely, 2^68812563 is an apocalyptic number.

68812563 is a deficient number, since it is larger than the sum of its proper divisors (28671117).

68812563 is a wasteful number, since it uses less digits than its factorization.

68812563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21446.

The product of its digits is 69120, while the sum is 39.

The square root of 68812563 is about 8295.3338088349. Note that the first 3 decimals coincide. The cubic root of 68812563 is about 409.7848623446.

The spelling of 68812563 in words is "sixty-eight million, eight hundred twelve thousand, five hundred sixty-three".