68311155 has 48 divisors (see below), whose sum is σ = 122304672. Its totient is φ = 32524800.

The previous prime is 68311147. The next prime is 68311157. The reversal of 68311155 is 55111386.

It is not a de Polignac number, because 68311155 - 2³ = 68311147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68311157) 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 47 ways as a sum of consecutive naturals, for example, 110407 + ... + 111023.

It is an arithmetic number, because the mean of its divisors is an integer number (2548014).

Almost surely, 2^68311155 is an apocalyptic number.

68311155 is a deficient number, since it is larger than the sum of its proper divisors (53993517).

68311155 is a wasteful number, since it uses less digits than its factorization.

68311155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708 (or 697 counting only the distinct ones).

The product of its digits is 3600, while the sum is 30.

The square root of 68311155 is about 8265.0562611515. The cubic root of 68311155 is about 408.7871254704.

The spelling of 68311155 in words is "sixty-eight million, three hundred eleven thousand, one hundred fifty-five".