11511933161 has 16 divisors (see below), whose sum is σ = 12238018560. Its totient is φ = 10798220160.

The previous prime is 11511933101. The next prime is 11511933187. The reversal of 11511933161 is 16133911511.

It is a cyclic number.

It is not a de Polignac number, because 11511933161 - 2²² = 11507738857 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11511933101) 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, 1252595 + ... + 1261751.

It is an arithmetic number, because the mean of its divisors is an integer number (764876160).

Almost surely, 2^11511933161 is an apocalyptic number.

It is an amenable number.

11511933161 is a deficient number, since it is larger than the sum of its proper divisors (726085399).

11511933161 is a wasteful number, since it uses less digits than its factorization.

11511933161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9824.

The product of its digits is 2430, while the sum is 32.

The spelling of 11511933161 in words is "eleven billion, five hundred eleven million, nine hundred thirty-three thousand, one hundred sixty-one".