68013377681 has 8 divisors (see below), whose sum is σ = 69349901760. Its totient is φ = 66678826032.

The previous prime is 68013377647. The next prime is 68013377741. The reversal of 68013377681 is 18677331086.

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 68013377681 - 2¹⁸ = 68013115537 is a prime.

It is a super-2 number, since 2×68013377681² (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 (68013377611) 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, 423371 + ... + 561488.

It is an arithmetic number, because the mean of its divisors is an integer number (8668737720).

Almost surely, 2^68013377681 is an apocalyptic number.

It is an amenable number.

68013377681 is a deficient number, since it is larger than the sum of its proper divisors (1336524079).

68013377681 is a wasteful number, since it uses less digits than its factorization.

68013377681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986215.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The spelling of 68013377681 in words is "sixty-eight billion, thirteen million, three hundred seventy-seven thousand, six hundred eighty-one".