68056637081771 has 16 divisors (see below), whose sum is σ = 75605107192608. Its totient is φ = 60869386828800.

The previous prime is 68056637081761. The next prime is 68056637081813. The reversal of 68056637081771 is 17718073665086.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68056637081771 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68056637081698 and 68056637081707.

It is not an unprimeable number, because it can be changed into a prime (68056637081701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 640407590 + ... + 640513851.

It is an arithmetic number, because the mean of its divisors is an integer number (4725319199538).

Almost surely, 2^{68056637081771} is an apocalyptic number.

68056637081771 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

68056637081771 is a deficient number, since it is larger than the sum of its proper divisors (7548470110837).

68056637081771 is a wasteful number, since it uses less digits than its factorization.

68056637081771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280921582.

The product of its (nonzero) digits is 71124480, while the sum is 65.

The spelling of 68056637081771 in words is "sixty-eight trillion, fifty-six billion, six hundred thirty-seven million, eighty-one thousand, seven hundred seventy-one".