68320155 has 8 divisors (see below), whose sum is σ = 109312272. Its totient is φ = 36437408.

The previous prime is 68320141. The next prime is 68320177. The reversal of 68320155 is 55102386.

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-68320155 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2277324 + ... + 2277353.

It is an arithmetic number, because the mean of its divisors is an integer number (13664034).

Almost surely, 2^68320155 is an apocalyptic number.

68320155 is a deficient number, since it is larger than the sum of its proper divisors (40992117).

68320155 is a wasteful number, since it uses less digits than its factorization.

68320155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4554685.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 68320155 is about 8265.6007041231. The cubic root of 68320155 is about 408.8050772606.

The spelling of 68320155 in words is "sixty-eight million, three hundred twenty thousand, one hundred fifty-five".