68163555 has 16 divisors (see below), whose sum is σ = 109718784. Its totient is φ = 36134880.

The previous prime is 68163553. The next prime is 68163569. The reversal of 68163555 is 55536186.

It is not a de Polignac number, because 68163555 - 2¹ = 68163553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68163553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11101 + ... + 16110.

It is an arithmetic number, because the mean of its divisors is an integer number (6857424).

Almost surely, 2^68163555 is an apocalyptic number.

68163555 is a deficient number, since it is larger than the sum of its proper divisors (41555229).

68163555 is a wasteful number, since it uses less digits than its factorization.

68163555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27386.

The product of its digits is 108000, while the sum is 39.

The square root of 68163555 is about 8256.1222738038. The cubic root of 68163555 is about 408.4924908743.

The spelling of 68163555 in words is "sixty-eight million, one hundred sixty-three thousand, five hundred fifty-five".