68018535 has 40 divisors (see below), whose sum is σ = 131318880. Its totient is φ = 33483456.

The previous prime is 68018519. The next prime is 68018539. The reversal of 68018535 is 53581086.

It is not a de Polignac number, because 68018535 - 2⁴ = 68018519 is a prime.

It is a super-2 number, since 2×68018535² = 9253042207092450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68018535.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68018539) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 1195 + ... + 11724.

It is an arithmetic number, because the mean of its divisors is an integer number (3282972).

Almost surely, 2^68018535 is an apocalyptic number.

68018535 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

68018535 is a deficient number, since it is larger than the sum of its proper divisors (63300345).

68018535 is a wasteful number, since it uses less digits than its factorization.

68018535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12949 (or 12940 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 68018535 is about 8247.3350241154. The cubic root of 68018535 is about 408.2025918607.

The spelling of 68018535 in words is "sixty-eight million, eighteen thousand, five hundred thirty-five".