12318661465 has 32 divisors (see below), whose sum is σ = 17240760576. Its totient is φ = 8350095360.

The previous prime is 12318661447. The next prime is 12318661501. The reversal of 12318661465 is 56416681321.

It is not a de Polignac number, because 12318661465 - 2⁷ = 12318661337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32349 + ... + 160261.

It is an arithmetic number, because the mean of its divisors is an integer number (538773768).

Almost surely, 2^12318661465 is an apocalyptic number.

It is an amenable number.

12318661465 is a deficient number, since it is larger than the sum of its proper divisors (4922099111).

12318661465 is a wasteful number, since it uses less digits than its factorization.

12318661465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128049.

The product of its digits is 207360, while the sum is 43.

The spelling of 12318661465 in words is "twelve billion, three hundred eighteen million, six hundred sixty-one thousand, four hundred sixty-five".