12440664365 has 8 divisors (see below), whose sum is σ = 14955037560. Its totient is φ = 9935037952.

The previous prime is 12440664361. The next prime is 12440664377. The reversal of 12440664365 is 56346604421.

It can be written as a sum of positive squares in 4 ways, for example, as 1136296681 + 11304367684 = 33709^2 + 106322^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12440664365 - 2² = 12440664361 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12440664361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2183564 + ... + 2189253.

It is an arithmetic number, because the mean of its divisors is an integer number (1869379695).

Almost surely, 2^12440664365 is an apocalyptic number.

It is an amenable number.

12440664365 is a deficient number, since it is larger than the sum of its proper divisors (2514373195).

12440664365 is an equidigital number, since it uses as much as digits as its factorization.

12440664365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4373391.

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 12440664365 in words is "twelve billion, four hundred forty million, six hundred sixty-four thousand, three hundred sixty-five".