68755545 has 12 divisors (see below), whose sum is σ = 119176356. Its totient is φ = 36669600.

The previous prime is 68755543. The next prime is 68755567. The reversal of 68755545 is 54555786.

It can be written as a sum of positive squares in 2 ways, for example, as 27846729 + 40908816 = 5277^2 + 6396^2 .

It is not a de Polignac number, because 68755545 - 2¹ = 68755543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1527901 = 68755545 / (6 + 8 + 7 + 5 + 5 + 5 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 68755545.

It is not an unprimeable number, because it can be changed into a prime (68755543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 763906 + ... + 763995.

It is an arithmetic number, because the mean of its divisors is an integer number (9931363).

Almost surely, 2^68755545 is an apocalyptic number.

It is an amenable number.

68755545 is a deficient number, since it is larger than the sum of its proper divisors (50420811).

68755545 is a wasteful number, since it uses less digits than its factorization.

68755545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527912 (or 1527909 counting only the distinct ones).

The product of its digits is 840000, while the sum is 45.

The square root of 68755545 is about 8291.8963452277. The cubic root of 68755545 is about 409.6716486683.

The spelling of 68755545 in words is "sixty-eight million, seven hundred fifty-five thousand, five hundred forty-five".