105268643861 has 2 divisors, whose sum is σ = 105268643862. Its totient is φ = 105268643860.

The previous prime is 105268643849. The next prime is 105268643899. The reversal of 105268643861 is 168346862501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77614616836 + 27654027025 = 278594^2 + 166295^2 .

It is an emirp because it is prime and its reverse (168346862501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 105268643861 - 2¹⁰ = 105268642837 is a prime.

It is a super-2 number, since 2×105268643861² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105268643801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52634321930 + 52634321931.

It is an arithmetic number, because the mean of its divisors is an integer number (52634321931).

Almost surely, 2^105268643861 is an apocalyptic number.

It is an amenable number.

105268643861 is a deficient number, since it is larger than the sum of its proper divisors (1).

105268643861 is an equidigital number, since it uses as much as digits as its factorization.

105268643861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1658880, while the sum is 50.

The spelling of 105268643861 in words is "one hundred five billion, two hundred sixty-eight million, six hundred forty-three thousand, eight hundred sixty-one".