68542535 has 8 divisors (see below), whose sum is σ = 82899456. Its totient is φ = 54401760.

The previous prime is 68542531. The next prime is 68542577. The reversal of 68542535 is 53524586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68542535 - 2² = 68542531 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68542531) 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 7 ways as a sum of consecutive naturals, for example, 53336 + ... + 54605.

It is an arithmetic number, because the mean of its divisors is an integer number (10362432).

Almost surely, 2^68542535 is an apocalyptic number.

68542535 is a deficient number, since it is larger than the sum of its proper divisors (14356921).

68542535 is a wasteful number, since it uses less digits than its factorization.

68542535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108073.

The product of its digits is 144000, while the sum is 38.

The square root of 68542535 is about 8279.0419131685. The cubic root of 68542535 is about 409.2481461938.

The spelling of 68542535 in words is "sixty-eight million, five hundred forty-two thousand, five hundred thirty-five".