68158617 has 8 divisors (see below), whose sum is σ = 90928224. Its totient is φ = 45414048.

The previous prime is 68158609. The next prime is 68158621. The reversal of 68158617 is 71685186.

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

It is not a de Polignac number, because 68158617 - 2³ = 68158609 is a prime.

It is a super-3 number, since 3×68158617³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (68158667) 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 7 ways as a sum of consecutive naturals, for example, 1453 + ... + 11765.

It is an arithmetic number, because the mean of its divisors is an integer number (11366028).

Almost surely, 2^68158617 is an apocalyptic number.

It is an amenable number.

68158617 is a deficient number, since it is larger than the sum of its proper divisors (22769607).

68158617 is a wasteful number, since it uses less digits than its factorization.

68158617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12519.

The product of its digits is 80640, while the sum is 42.

The square root of 68158617 is about 8255.8232175841. The cubic root of 68158617 is about 408.4826264405.

The spelling of 68158617 in words is "sixty-eight million, one hundred fifty-eight thousand, six hundred seventeen".