68136538893 has 8 divisors (see below), whose sum is σ = 91051056000. Its totient is φ = 45323190528.

The previous prime is 68136538861. The next prime is 68136538949. The reversal of 68136538893 is 39883563186.

68136538893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68136538893 - 2⁵ = 68136538861 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68136538193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25290613 + ... + 25293306.

It is an arithmetic number, because the mean of its divisors is an integer number (11381382000).

Almost surely, 2^68136538893 is an apocalyptic number.

It is an amenable number.

68136538893 is a deficient number, since it is larger than the sum of its proper divisors (22914517107).

68136538893 is a wasteful number, since it uses less digits than its factorization.

68136538893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50584371.

The product of its digits is 22394880, while the sum is 60.

The spelling of 68136538893 in words is "sixty-eight billion, one hundred thirty-six million, five hundred thirty-eight thousand, eight hundred ninety-three".