11864712181 has 16 divisors (see below), whose sum is σ = 14003829760. Its totient is φ = 9836951040.

The previous prime is 11864712179. The next prime is 11864712221. The reversal of 11864712181 is 18121746811.

11864712181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11864712181 - 2¹ = 11864712179 is a prime.

It is a super-2 number, since 2×11864712181² (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 (11864712121) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 480325 + ... + 504421.

It is an arithmetic number, because the mean of its divisors is an integer number (875239360).

Almost surely, 2^11864712181 is an apocalyptic number.

It is an amenable number.

11864712181 is a deficient number, since it is larger than the sum of its proper divisors (2139117579).

11864712181 is a wasteful number, since it uses less digits than its factorization.

11864712181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26404.

The product of its digits is 21504, while the sum is 40.

The spelling of 11864712181 in words is "eleven billion, eight hundred sixty-four million, seven hundred twelve thousand, one hundred eighty-one".