105661050565 has 16 divisors (see below), whose sum is σ = 144914496768. Its totient is φ = 72449335296.

The previous prime is 105661050563. The next prime is 105661050569. The reversal of 105661050565 is 565050166501.

It is a cyclic number.

It is not a de Polignac number, because 105661050565 - 2¹ = 105661050563 is a prime.

It is a super-2 number, since 2×105661050565² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105661050563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 662469 + ... + 806341.

It is an arithmetic number, because the mean of its divisors is an integer number (9057156048).

Almost surely, 2^105661050565 is an apocalyptic number.

It is an amenable number.

105661050565 is a deficient number, since it is larger than the sum of its proper divisors (39253446203).

105661050565 is a wasteful number, since it uses less digits than its factorization.

105661050565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164868.

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 105661050565 in words is "one hundred five billion, six hundred sixty-one million, fifty thousand, five hundred sixty-five".