16505570105 has 8 divisors (see below), whose sum is σ = 19826320200. Its totient is φ = 13191365376.

The previous prime is 16505570099. The next prime is 16505570119. The reversal of 16505570105 is 50107550561.

It can be written as a sum of positive squares in 4 ways, for example, as 3341584 + 16502228521 = 1828^2 + 128461^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16505570105 - 2⁴ = 16505570089 is a prime.

It is a super-2 number, since 2×16505570105² (a number of 21 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, 1630790 + ... + 1640879.

It is an arithmetic number, because the mean of its divisors is an integer number (2478290025).

Almost surely, 2^16505570105 is an apocalyptic number.

It is an amenable number.

16505570105 is a deficient number, since it is larger than the sum of its proper divisors (3320750095).

16505570105 is a wasteful number, since it uses less digits than its factorization.

16505570105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3272683.

The product of its (nonzero) digits is 26250, while the sum is 35.

It can be divided in two parts, 1650 and 5570105, that added together give a palindrome (5571755).

The spelling of 16505570105 in words is "sixteen billion, five hundred five million, five hundred seventy thousand, one hundred five".