105121644543 has 12 divisors (see below), whose sum is σ = 152105541328. Its totient is φ = 69959635200.

The previous prime is 105121644541. The next prime is 105121644577. The reversal of 105121644543 is 345446121501.

105121644543 is a `hidden beast` number, since 1 + 0 + 5 + 1 + 2 + 1 + 644 + 5 + 4 + 3 = 666.

It is not a de Polignac number, because 105121644543 - 2¹ = 105121644541 is a prime.

It is a super-2 number, since 2×105121644543² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 105121644498 and 105121644507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105121644541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10116283 + ... + 10126668.

Almost surely, 2^105121644543 is an apocalyptic number.

105121644543 is a deficient number, since it is larger than the sum of its proper divisors (46983896785).

105121644543 is a wasteful number, since it uses less digits than its factorization.

105121644543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20243534 (or 20243531 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 105121644543 in words is "one hundred five billion, one hundred twenty-one million, six hundred forty-four thousand, five hundred forty-three".