68144746781071 has 16 divisors (see below), whose sum is σ = 69509531248128. Its totient is φ = 66787971170400.

The previous prime is 68144746781057. The next prime is 68144746781087. The reversal of 68144746781071 is 17018764744186.

It is a cyclic number.

It is not a de Polignac number, because 68144746781071 - 2¹⁵ = 68144746748303 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68144746780994 and 68144746781012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68144746787071) 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, 498331710 + ... + 498468436.

It is an arithmetic number, because the mean of its divisors is an integer number (4344345703008).

Almost surely, 2^{68144746781071} is an apocalyptic number.

68144746781071 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

68144746781071 is a deficient number, since it is larger than the sum of its proper divisors (1364784467057).

68144746781071 is a wasteful number, since it uses less digits than its factorization.

68144746781071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165942.

The product of its (nonzero) digits is 50577408, while the sum is 64.

The spelling of 68144746781071 in words is "sixty-eight trillion, one hundred forty-four billion, seven hundred forty-six million, seven hundred eighty-one thousand, seventy-one".