68812565 has 4 divisors (see below), whose sum is σ = 82575084. Its totient is φ = 55050048.

The previous prime is 68812543. The next prime is 68812577. The reversal of 68812565 is 56521886.

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 19377604 + 49434961 = 4402^2 + 7031^2 .

It is a cyclic number.

It is not a de Polignac number, because 68812565 - 2¹⁴ = 68796181 is a prime.

It is a Duffinian number.

It is a congruent 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, 6881252 + ... + 6881261.

It is an arithmetic number, because the mean of its divisors is an integer number (20643771).

Almost surely, 2^68812565 is an apocalyptic number.

It is an amenable number.

68812565 is a deficient number, since it is larger than the sum of its proper divisors (13762519).

68812565 is a wasteful number, since it uses less digits than its factorization.

68812565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13762518.

The product of its digits is 115200, while the sum is 41.

The square root of 68812565 is about 8295.3339293846. Note that the first 3 decimals coincide. The cubic root of 68812565 is about 409.7848663147.

The spelling of 68812565 in words is "sixty-eight million, eight hundred twelve thousand, five hundred sixty-five".