68218535 has 48 divisors (see below), whose sum is σ = 110069280. Its totient is φ = 39997440.

The previous prime is 68218523. The next prime is 68218543. The reversal of 68218535 is 53581286.

It is not a de Polignac number, because 68218535 - 2⁴ = 68218519 is a prime.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 45071 + ... + 46559.

It is an arithmetic number, because the mean of its divisors is an integer number (2293110).

Almost surely, 2^68218535 is an apocalyptic number.

68218535 is a deficient number, since it is larger than the sum of its proper divisors (41850745).

68218535 is a wasteful number, since it uses less digits than its factorization.

68218535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536 (or 1529 counting only the distinct ones).

The product of its digits is 57600, while the sum is 38.

The square root of 68218535 is about 8259.4512529586. The cubic root of 68218535 is about 408.6022899279.

The spelling of 68218535 in words is "sixty-eight million, two hundred eighteen thousand, five hundred thirty-five".