68156506 has 16 divisors (see below), whose sum is σ = 111798720. Its totient is φ = 30905280.

The previous prime is 68156503. The next prime is 68156513. The reversal of 68156506 is 60565186.

It is not an unprimeable number, because it can be changed into a prime (68156503) 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, 6130 + ... + 13186.

It is an arithmetic number, because the mean of its divisors is an integer number (6987420).

Almost surely, 2^68156506 is an apocalyptic number.

68156506 is a deficient number, since it is larger than the sum of its proper divisors (43642214).

68156506 is a wasteful number, since it uses less digits than its factorization.

68156506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7509.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 68156506 is about 8255.6953674418. The cubic root of 68156506 is about 408.4784092397.

The spelling of 68156506 in words is "sixty-eight million, one hundred fifty-six thousand, five hundred six".