68273645 has 16 divisors (see below), whose sum is σ = 90123840. Its totient is φ = 49648720.

The previous prime is 68273641. The next prime is 68273713. The reversal of 68273645 is 54637286.

It is a happy number.

It is not a de Polignac number, because 68273645 - 2² = 68273641 is a prime.

It is a super-3 number, since 3×68273645³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68273641) 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, 1526 + ... + 11784.

It is an arithmetic number, because the mean of its divisors is an integer number (5632740).

Almost surely, 2^68273645 is an apocalyptic number.

It is an amenable number.

68273645 is a deficient number, since it is larger than the sum of its proper divisors (21850195).

68273645 is a wasteful number, since it uses less digits than its factorization.

68273645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10297 (or 10275 counting only the distinct ones).

The product of its digits is 241920, while the sum is 41.

The square root of 68273645 is about 8262.7867575050. The cubic root of 68273645 is about 408.7122894132.

The spelling of 68273645 in words is "sixty-eight million, two hundred seventy-three thousand, six hundred forty-five".