68100533639 has 4 divisors (see below), whose sum is σ = 68106167856. Its totient is φ = 68094899424.

The previous prime is 68100533623. The next prime is 68100533653. The reversal of 68100533639 is 93633500186.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68100533639 - 2⁴ = 68100533623 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68100533639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68100533659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2798939 + ... + 2823164.

It is an arithmetic number, because the mean of its divisors is an integer number (17026541964).

Almost surely, 2^68100533639 is an apocalyptic number.

68100533639 is a deficient number, since it is larger than the sum of its proper divisors (5634217).

68100533639 is a wasteful number, since it uses less digits than its factorization.

68100533639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5634216.

The product of its (nonzero) digits is 349920, while the sum is 44.

The spelling of 68100533639 in words is "sixty-eight billion, one hundred million, five hundred thirty-three thousand, six hundred thirty-nine".