11996671181 has 16 divisors (see below), whose sum is σ = 13526811648. Its totient is φ = 10545380400.

The previous prime is 11996671123. The next prime is 11996671187. The reversal of 11996671181 is 18117669911.

It is a cyclic number.

It is not a de Polignac number, because 11996671181 - 2¹⁴ = 11996654797 is a prime.

It is a super-2 number, since 2×11996671181² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11996671187) 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, 96875 + ... + 182696.

It is an arithmetic number, because the mean of its divisors is an integer number (845425728).

Almost surely, 2^11996671181 is an apocalyptic number.

11996671181 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11996671181 is a deficient number, since it is larger than the sum of its proper divisors (1530140467).

11996671181 is a wasteful number, since it uses less digits than its factorization.

11996671181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279712.

The product of its digits is 163296, while the sum is 50.

The spelling of 11996671181 in words is "eleven billion, nine hundred ninety-six million, six hundred seventy-one thousand, one hundred eighty-one".