105444868457 has 4 divisors (see below), whose sum is σ = 111647507796. Its totient is φ = 99242229120.

The previous prime is 105444868427. The next prime is 105444868481. The reversal of 105444868457 is 754868444501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 754868444501 = 6469 ⋅116690129.

It can be written as a sum of positive squares in 2 ways, for example, as 56481800281 + 48963068176 = 237659^2 + 221276^2 .

It is a cyclic number.

It is not a de Polignac number, because 105444868457 - 2¹² = 105444864361 is a prime.

It is a super-2 number, since 2×105444868457² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105444868427) 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, 3101319644 + ... + 3101319677.

It is an arithmetic number, because the mean of its divisors is an integer number (27911876949).

Almost surely, 2^105444868457 is an apocalyptic number.

105444868457 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

105444868457 is a deficient number, since it is larger than the sum of its proper divisors (6202639339).

105444868457 is an equidigital number, since it uses as much as digits as its factorization.

105444868457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6202639338.

The product of its (nonzero) digits is 17203200, while the sum is 56.

The spelling of 105444868457 in words is "one hundred five billion, four hundred forty-four million, eight hundred sixty-eight thousand, four hundred fifty-seven".