105566449798538 has 4 divisors (see below), whose sum is σ = 158349674697810. Its totient is φ = 52783224899268.

The previous prime is 105566449798531. The next prime is 105566449798567. The reversal of 105566449798538 is 835897944665501.

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

It can be written as a sum of positive squares in only one way, i.e., 100665242704849 + 4901207093689 = 10033207^2 + 2213867^2 .

It is a super-2 number, since 2×105566449798538² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105566449798531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26391612449633 + ... + 26391612449636.

Almost surely, 2^{105566449798538} is an apocalyptic number.

105566449798538 is a deficient number, since it is larger than the sum of its proper divisors (52783224899272).

105566449798538 is an equidigital number, since it uses as much as digits as its factorization.

105566449798538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52783224899271.

The product of its (nonzero) digits is 7838208000, while the sum is 80.

The spelling of 105566449798538 in words is "one hundred five trillion, five hundred sixty-six billion, four hundred forty-nine million, seven hundred ninety-eight thousand, five hundred thirty-eight".