68163715 has 4 divisors (see below), whose sum is σ = 81796464. Its totient is φ = 54530968.

The previous prime is 68163713. The next prime is 68163721. The reversal of 68163715 is 51736186.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68163715 - 2¹ = 68163713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68163713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6816367 + ... + 6816376.

It is an arithmetic number, because the mean of its divisors is an integer number (20449116).

Almost surely, 2^68163715 is an apocalyptic number.

68163715 is a deficient number, since it is larger than the sum of its proper divisors (13632749).

68163715 is a wasteful number, since it uses less digits than its factorization.

68163715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13632748.

The product of its digits is 30240, while the sum is 37.

The square root of 68163715 is about 8256.1319635771. The cubic root of 68163715 is about 408.4928104916.

The spelling of 68163715 in words is "sixty-eight million, one hundred sixty-three thousand, seven hundred fifteen".