12664455165 has 16 divisors (see below), whose sum is σ = 22514587200. Its totient is φ = 6754376016.

The previous prime is 12664455163. The next prime is 12664455169. The reversal of 12664455165 is 56155446621.

12664455165 is a `hidden beast` number, since 126 + 6 + 4 + 4 + 5 + 516 + 5 = 666.

It is not a de Polignac number, because 12664455165 - 2¹ = 12664455163 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12664455165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12664455163) 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, 46905255 + ... + 46905524.

It is an arithmetic number, because the mean of its divisors is an integer number (1407161700).

Almost surely, 2^12664455165 is an apocalyptic number.

12664455165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12664455165 is a deficient number, since it is larger than the sum of its proper divisors (9850132035).

12664455165 is an equidigital number, since it uses as much as digits as its factorization.

12664455165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93810793 (or 93810787 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The spelling of 12664455165 in words is "twelve billion, six hundred sixty-four million, four hundred fifty-five thousand, one hundred sixty-five".