68518587105 has 12 divisors (see below), whose sum is σ = 118765551060. Its totient is φ = 36543246432.

The previous prime is 68518587079. The next prime is 68518587107. The reversal of 68518587105 is 50178581586.

68518587105 is a `hidden beast` number, since 6 + 8 + 51 + 8 + 587 + 1 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11247875136 + 57270711969 = 106056^2 + 239313^2 .

It is not a de Polignac number, because 68518587105 - 2⁶ = 68518587041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68518587107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 761317590 + ... + 761317679.

It is an arithmetic number, because the mean of its divisors is an integer number (9897129255).

Almost surely, 2^68518587105 is an apocalyptic number.

It is an amenable number.

68518587105 is a deficient number, since it is larger than the sum of its proper divisors (50246963955).

68518587105 is a wasteful number, since it uses less digits than its factorization.

68518587105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522635280 (or 1522635277 counting only the distinct ones).

The product of its (nonzero) digits is 2688000, while the sum is 54.

The spelling of 68518587105 in words is "sixty-eight billion, five hundred eighteen million, five hundred eighty-seven thousand, one hundred five".