68155646 has 8 divisors (see below), whose sum is σ = 110097624. Its totient is φ = 31456440.

The previous prime is 68155643. The next prime is 68155663. The reversal of 68155646 is 64655186.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68155643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1310660 + ... + 1310711.

It is an arithmetic number, because the mean of its divisors is an integer number (13762203).

Almost surely, 2^68155646 is an apocalyptic number.

68155646 is a deficient number, since it is larger than the sum of its proper divisors (41941978).

68155646 is a wasteful number, since it uses less digits than its factorization.

68155646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2621386.

The product of its digits is 172800, while the sum is 41.

The square root of 68155646 is about 8255.6432820223. The cubic root of 68155646 is about 408.4766911698.

The spelling of 68155646 in words is "sixty-eight million, one hundred fifty-five thousand, six hundred forty-six".