68557533 has 16 divisors (see below), whose sum is σ = 99990336. Its totient is φ = 41437440.

The previous prime is 68557507. The next prime is 68557553. The reversal of 68557533 is 33575586.

It is not a de Polignac number, because 68557533 - 2¹⁴ = 68541149 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68557553) 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 15 ways as a sum of consecutive naturals, for example, 10485 + ... + 15717.

It is an arithmetic number, because the mean of its divisors is an integer number (6249396).

Almost surely, 2^68557533 is an apocalyptic number.

It is an amenable number.

68557533 is a deficient number, since it is larger than the sum of its proper divisors (31432803).

68557533 is a wasteful number, since it uses less digits than its factorization.

68557533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5644.

The product of its digits is 378000, while the sum is 42.

The square root of 68557533 is about 8279.9476447620. The cubic root of 68557533 is about 409.2779936263.

The spelling of 68557533 in words is "sixty-eight million, five hundred fifty-seven thousand, five hundred thirty-three".