68625745 has 16 divisors (see below), whose sum is σ = 85516560. Its totient is φ = 52804864.

The previous prime is 68625731. The next prime is 68625749. The reversal of 68625745 is 54752686.

It can be written as a sum of positive squares in 8 ways, for example, as 1008016 + 67617729 = 1004^2 + 8223^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68625745 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68625749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45219 + ... + 46711.

It is an arithmetic number, because the mean of its divisors is an integer number (5344785).

Almost surely, 2^68625745 is an apocalyptic number.

It is an amenable number.

68625745 is a deficient number, since it is larger than the sum of its proper divisors (16890815).

68625745 is a wasteful number, since it uses less digits than its factorization.

68625745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1844.

The product of its digits is 403200, while the sum is 43.

The square root of 68625745 is about 8284.0657288556. The cubic root of 68625745 is about 409.4136870379.

The spelling of 68625745 in words is "sixty-eight million, six hundred twenty-five thousand, seven hundred forty-five".