68391379081 has 8 divisors (see below), whose sum is σ = 68461562528. Its totient is φ = 68321232000.

The previous prime is 68391379079. The next prime is 68391379153. The reversal of 68391379081 is 18097319386.

68391379081 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 a cyclic number.

It is not a de Polignac number, because 68391379081 - 2¹ = 68391379079 is a prime.

It is a super-2 number, since 2×68391379081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68391379051) 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, 5139046 + ... + 5152336.

It is an arithmetic number, because the mean of its divisors is an integer number (8557695316).

Almost surely, 2^68391379081 is an apocalyptic number.

It is an amenable number.

68391379081 is a deficient number, since it is larger than the sum of its proper divisors (70183447).

68391379081 is a wasteful number, since it uses less digits than its factorization.

68391379081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18183.

The product of its (nonzero) digits is 1959552, while the sum is 55.

The spelling of 68391379081 in words is "sixty-eight billion, three hundred ninety-one million, three hundred seventy-nine thousand, eighty-one".