68123645 has 8 divisors (see below), whose sum is σ = 86051040. Its totient is φ = 51630480.

The previous prime is 68123611. The next prime is 68123651. The reversal of 68123645 is 54632186.

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

It is not a de Polignac number, because 68123645 - 2¹² = 68119549 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 358451 + ... + 358640.

It is an arithmetic number, because the mean of its divisors is an integer number (10756380).

Almost surely, 2^68123645 is an apocalyptic number.

It is an amenable number.

68123645 is a deficient number, since it is larger than the sum of its proper divisors (17927395).

68123645 is a wasteful number, since it uses less digits than its factorization.

68123645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717115.

The product of its digits is 34560, while the sum is 35.

The square root of 68123645 is about 8253.7049256682. The cubic root of 68123645 is about 408.4127507152.

The spelling of 68123645 in words is "sixty-eight million, one hundred twenty-three thousand, six hundred forty-five".