68105862841 has 9 divisors (see below), whose sum is σ = 70543161871. Its totient is φ = 65750077624.

The previous prime is 68105862829. The next prime is 68105862901. The reversal of 68105862841 is 14826850186.

The square root of 68105862841 is 260971.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 35713062441 + 32392800400 = 188979^2 + 179980^2 .

It is not a de Polignac number, because 68105862841 - 2⁹ = 68105862329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68105862821) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7563660 + ... + 7572658.

Almost surely, 2^68105862841 is an apocalyptic number.

68105862841 is the 260971-st square number.

68105862841 is the 130486-th centered octagonal number.

It is an amenable number.

68105862841 is a deficient number, since it is larger than the sum of its proper divisors (2437299030).

68105862841 is an frugal number, since it uses more digits than its factorization.

68105862841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18056 (or 9028 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 49.

Multiplying 68105862841 by its sum of digits (49), we get a square (3337187279209 = 1826797²).

The spelling of 68105862841 in words is "sixty-eight billion, one hundred five million, eight hundred sixty-two thousand, eight hundred forty-one".