11636512172011 has 4 divisors (see below), whose sum is σ = 11647999351872. Its totient is φ = 11625024992152.

The previous prime is 11636512171937. The next prime is 11636512172023. The reversal of 11636512172011 is 11027121563611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11636512172011 - 2¹¹ = 11636512169963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11636512572011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5743588411 + ... + 5743590436.

It is an arithmetic number, because the mean of its divisors is an integer number (2911999837968).

Almost surely, 2^{11636512172011} is an apocalyptic number.

11636512172011 is a deficient number, since it is larger than the sum of its proper divisors (11487179861).

11636512172011 is a wasteful number, since it uses less digits than its factorization.

11636512172011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11487179860.

The product of its (nonzero) digits is 15120, while the sum is 37.

The spelling of 11636512172011 in words is "eleven trillion, six hundred thirty-six billion, five hundred twelve million, one hundred seventy-two thousand, eleven".