68444745 has 64 divisors (see below), whose sum is σ = 121896960. Its totient is φ = 32659200.

The previous prime is 68444741. The next prime is 68444759. The reversal of 68444745 is 54744486.

It is not a de Polignac number, because 68444745 - 2² = 68444741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68444697 and 68444706.

It is not an unprimeable number, because it can be changed into a prime (68444741) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 538872 + ... + 538998.

It is an arithmetic number, because the mean of its divisors is an integer number (1904640).

Almost surely, 2^68444745 is an apocalyptic number.

It is an amenable number.

68444745 is a deficient number, since it is larger than the sum of its proper divisors (53452215).

68444745 is a wasteful number, since it uses less digits than its factorization.

68444745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246.

The product of its digits is 430080, while the sum is 42.

The square root of 68444745 is about 8273.1339285666. The cubic root of 68444745 is about 409.0534280588.

The spelling of 68444745 in words is "sixty-eight million, four hundred forty-four thousand, seven hundred forty-five".