68643045 has 20 divisors (see below), whose sum is σ = 123049740. Its totient is φ = 36609408.

The previous prime is 68643031. The next prime is 68643053. The reversal of 68643045 is 54034686.

68643045 is a `hidden beast` number, since 6 + 8 + 643 + 0 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 46908801 + 21734244 = 6849^2 + 4662^2 .

It is not a de Polignac number, because 68643045 - 2⁸ = 68642789 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 84340 + ... + 85149.

It is an arithmetic number, because the mean of its divisors is an integer number (6152487).

Almost surely, 2^68643045 is an apocalyptic number.

It is an amenable number.

68643045 is a deficient number, since it is larger than the sum of its proper divisors (54406695).

68643045 is a wasteful number, since it uses less digits than its factorization.

68643045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169506 (or 169497 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 68643045 is about 8285.1098363269. The cubic root of 68643045 is about 409.4480874498.

The spelling of 68643045 in words is "sixty-eight million, six hundred forty-three thousand, forty-five".