68355553 has 8 divisors (see below), whose sum is σ = 78446720. Its totient is φ = 58345920.

The previous prime is 68355503. The next prime is 68355629. The reversal of 68355553 is 35555386.

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

It is a cyclic number.

It is not a de Polignac number, because 68355553 - 2⁹ = 68355041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68355503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18573 + ... + 21946.

It is an arithmetic number, because the mean of its divisors is an integer number (9805840).

Almost surely, 2^68355553 is an apocalyptic number.

It is an amenable number.

68355553 is a deficient number, since it is larger than the sum of its proper divisors (10091167).

68355553 is a wasteful number, since it uses less digits than its factorization.

68355553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40767.

The product of its digits is 270000, while the sum is 40.

The square root of 68355553 is about 8267.7417110115. The cubic root of 68355553 is about 408.8756683555.

The spelling of 68355553 in words is "sixty-eight million, three hundred fifty-five thousand, five hundred fifty-three".