105405021444 has 24 divisors (see below), whose sum is σ = 245950327168. Its totient is φ = 35134253280.

The previous prime is 105405021389. The next prime is 105405021461. The reversal of 105405021444 is 444120504501.

It is a super-2 number, since 2×105405021444² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 961029 + ... + 1065075.

Almost surely, 2^105405021444 is an apocalyptic number.

It is an amenable number.

105405021444 is an abundant number, since it is smaller than the sum of its proper divisors (140545305724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

105405021444 is a wasteful number, since it uses less digits than its factorization.

105405021444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188475 (or 188473 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 105405021444 its reverse (444120504501), we get a palindrome (549525525945).

The spelling of 105405021444 in words is "one hundred five billion, four hundred five million, twenty-one thousand, four hundred forty-four".