105236378581 has 8 divisors (see below), whose sum is σ = 107814751128. Its totient is φ = 102658560000.

The previous prime is 105236378561. The next prime is 105236378591. The reversal of 105236378581 is 185873632501.

It can be written as a sum of positive squares in 4 ways, for example, as 29647674225 + 75588704356 = 172185^2 + 274934^2 .

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 105236378581 - 2⁵ = 105236378549 is a prime.

It is a super-2 number, since 2×105236378581² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105236378551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259971 + ... + 527311.

It is an arithmetic number, because the mean of its divisors is an integer number (13476843891).

Almost surely, 2^105236378581 is an apocalyptic number.

It is an amenable number.

105236378581 is a deficient number, since it is larger than the sum of its proper divisors (2578372547).

105236378581 is an equidigital number, since it uses as much as digits as its factorization.

105236378581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276983.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 105236378581 in words is "one hundred five billion, two hundred thirty-six million, three hundred seventy-eight thousand, five hundred eighty-one".