68367520845 has 24 divisors (see below), whose sum is σ = 127619373336. Its totient is φ = 33657856128.

The previous prime is 68367520843. The next prime is 68367520867. The reversal of 68367520845 is 54802576386.

68367520845 is a `hidden beast` number, since 6 + 8 + 36 + 7 + 520 + 84 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3675633129 + 64691887716 = 60627^2 + 254346^2 .

It is not a de Polignac number, because 68367520845 - 2¹ = 68367520843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68367520791 and 68367520800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68367520843) 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 23 ways as a sum of consecutive naturals, for example, 58433194 + ... + 58434363.

It is an arithmetic number, because the mean of its divisors is an integer number (5317473889).

Almost surely, 2^68367520845 is an apocalyptic number.

68367520845 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

68367520845 is a deficient number, since it is larger than the sum of its proper divisors (59251852491).

68367520845 is a wasteful number, since it uses less digits than its factorization.

68367520845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116867581 (or 116867578 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 54.

The spelling of 68367520845 in words is "sixty-eight billion, three hundred sixty-seven million, five hundred twenty thousand, eight hundred forty-five".