68163853 has 8 divisors (see below), whose sum is σ = 70108920. Its totient is φ = 66232320.

The previous prime is 68163841. The next prime is 68163859. The reversal of 68163853 is 35836186.

It can be written as a sum of positive squares in 4 ways, for example, as 1790244 + 66373609 = 1338^2 + 8147^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68163853 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 (68163859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7303 + ... + 13771.

It is an arithmetic number, because the mean of its divisors is an integer number (8763615).

Almost surely, 2^68163853 is an apocalyptic number.

It is an amenable number.

68163853 is a deficient number, since it is larger than the sum of its proper divisors (1945067).

68163853 is a wasteful number, since it uses less digits than its factorization.

68163853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6767.

The product of its digits is 103680, while the sum is 40.

The square root of 68163853 is about 8256.1403209975. The cubic root of 68163853 is about 408.4930861611.

The spelling of 68163853 in words is "sixty-eight million, one hundred sixty-three thousand, eight hundred fifty-three".