68641845 has 32 divisors (see below), whose sum is σ = 113438208. Its totient is φ = 35417088.

The previous prime is 68641841. The next prime is 68641847. The reversal of 68641845 is 54814686.

It is not a de Polignac number, because 68641845 - 2² = 68641841 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 68641797 and 68641806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68641841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 186852 + ... + 187218.

It is an arithmetic number, because the mean of its divisors is an integer number (3544944).

Almost surely, 2^68641845 is an apocalyptic number.

It is an amenable number.

68641845 is a deficient number, since it is larger than the sum of its proper divisors (44796363).

68641845 is a wasteful number, since it uses less digits than its factorization.

68641845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749.

The product of its digits is 184320, while the sum is 42.

The square root of 68641845 is about 8285.0374169342. The cubic root of 68641845 is about 409.4457014806.

The spelling of 68641845 in words is "sixty-eight million, six hundred forty-one thousand, eight hundred forty-five".