105831855738445 has 4 divisors (see below), whose sum is σ = 126998226886140. Its totient is φ = 84665484590752.

The previous prime is 105831855738443. The next prime is 105831855738449. The reversal of 105831855738445 is 544837558138501.

105831855738445 = 7274333² + 7274334².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52915920594889 + 52915935143556 = 7274333^2 + 7274334^2 .

It is a cyclic number.

It is not a de Polignac number, because 105831855738445 - 2¹ = 105831855738443 is a prime.

It is a super-2 number, since 2×105831855738445² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105831855738443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10583185573840 + ... + 10583185573849.

It is an arithmetic number, because the mean of its divisors is an integer number (31749556721535).

Almost surely, 2^{105831855738445} is an apocalyptic number.

105831855738445 is the 7274334-th centered square number.

It is an amenable number.

105831855738445 is a deficient number, since it is larger than the sum of its proper divisors (21166371147695).

105831855738445 is an equidigital number, since it uses as much as digits as its factorization.

105831855738445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21166371147694.

The product of its (nonzero) digits is 322560000, while the sum is 67.

The spelling of 105831855738445 in words is "one hundred five trillion, eight hundred thirty-one billion, eight hundred fifty-five million, seven hundred thirty-eight thousand, four hundred forty-five".