68163861 has 4 divisors (see below), whose sum is σ = 90885152. Its totient is φ = 45442572.

The previous prime is 68163859. The next prime is 68163871. The reversal of 68163861 is 16836186.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 68163861 - 2¹ = 68163859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68163841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11360641 + ... + 11360646.

It is an arithmetic number, because the mean of its divisors is an integer number (22721288).

Almost surely, 2^68163861 is an apocalyptic number.

It is an amenable number.

68163861 is a deficient number, since it is larger than the sum of its proper divisors (22721291).

68163861 is a wasteful number, since it uses less digits than its factorization.

68163861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22721290.

The product of its digits is 41472, while the sum is 39.

The square root of 68163861 is about 8256.1408054853. The cubic root of 68163861 is about 408.4931021419.

The spelling of 68163861 in words is "sixty-eight million, one hundred sixty-three thousand, eight hundred sixty-one".