11005601010505 has 8 divisors (see below), whose sum is σ = 13206740172552. Its totient is φ = 8804468168448.

The previous prime is 11005601010497. The next prime is 11005601010553. The reversal of 11005601010505 is 50501010650011.

It can be written as a sum of positive squares in 4 ways, for example, as 3487810234624 + 7517790775881 = 1867568^2 + 2741859^2 .

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 11005601010505 - 2³ = 11005601010497 is a prime.

It is a super-2 number, since 2×11005601010505² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11005601010505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4121377 + ... + 6244753.

It is an arithmetic number, because the mean of its divisors is an integer number (1650842521569).

Almost surely, 2^{11005601010505} is an apocalyptic number.

It is an amenable number.

11005601010505 is a deficient number, since it is larger than the sum of its proper divisors (2201139162047).

11005601010505 is a wasteful number, since it uses less digits than its factorization.

11005601010505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3159995.

The product of its (nonzero) digits is 750, while the sum is 25.

Adding to 11005601010505 its reverse (50501010650011), we get a palindrome (61506611660516).

The spelling of 11005601010505 in words is "eleven trillion, five billion, six hundred one million, ten thousand, five hundred five".