11661050005 has 16 divisors (see below), whose sum is σ = 15271141248. Its totient is φ = 8477560000.

The previous prime is 11661049991. The next prime is 11661050039. The reversal of 11661050005 is 50005016611.

It is not a de Polignac number, because 11661050005 - 2¹³ = 11661041813 is a prime.

It is a super-2 number, since 2×11661050005² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112080 + ... + 189430.

It is an arithmetic number, because the mean of its divisors is an integer number (954446328).

Almost surely, 2^11661050005 is an apocalyptic number.

It is an amenable number.

11661050005 is a deficient number, since it is larger than the sum of its proper divisors (3610091243).

11661050005 is a wasteful number, since it uses less digits than its factorization.

11661050005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80108.

The product of its (nonzero) digits is 900, while the sum is 25.

Adding to 11661050005 its reverse (50005016611), we get a palindrome (61666066616).

The spelling of 11661050005 in words is "eleven billion, six hundred sixty-one million, fifty thousand, five".