12664140181 has 64 divisors (see below), whose sum is σ = 17020108800. Its totient is φ = 9133286400.

The previous prime is 12664140179. The next prime is 12664140217. The reversal of 12664140181 is 18104146621.

It is a happy number.

It is not a de Polignac number, because 12664140181 - 2¹ = 12664140179 is a prime.

It is a super-2 number, since 2×12664140181² (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 (12664140161) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7821390 + ... + 7823008.

It is an arithmetic number, because the mean of its divisors is an integer number (265939200).

Almost surely, 2^12664140181 is an apocalyptic number.

12664140181 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12664140181 is a deficient number, since it is larger than the sum of its proper divisors (4355968619).

12664140181 is a wasteful number, since it uses less digits than its factorization.

12664140181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810.

The product of its (nonzero) digits is 9216, while the sum is 34.

The spelling of 12664140181 in words is "twelve billion, six hundred sixty-four million, one hundred forty thousand, one hundred eighty-one".