68115555 has 24 divisors (see below), whose sum is σ = 120949920. Its totient is φ = 35441280.

The previous prime is 68115529. The next prime is 68115563. The reversal of 68115555 is 55551186.

It is a de Polignac number, because none of the positive numbers 2^k-68115555 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16615 + ... + 20304.

It is an arithmetic number, because the mean of its divisors is an integer number (5039580).

Almost surely, 2^68115555 is an apocalyptic number.

68115555 is a deficient number, since it is larger than the sum of its proper divisors (52834365).

68115555 is a wasteful number, since it uses less digits than its factorization.

68115555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36971 (or 36968 counting only the distinct ones).

The product of its digits is 30000, while the sum is 36.

The square root of 68115555 is about 8253.2148281745. The cubic root of 68115555 is about 408.3965831034.

The spelling of 68115555 in words is "sixty-eight million, one hundred fifteen thousand, five hundred fifty-five".