12655400065 has 16 divisors (see below), whose sum is σ = 18933793920. Its totient is φ = 7889080320.

The previous prime is 12655400059. The next prime is 12655400077. The reversal of 12655400065 is 56000455621.

It is not a de Polignac number, because 12655400065 - 2⁹ = 12655399553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12655400065.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16435200 + ... + 16435969.

It is an arithmetic number, because the mean of its divisors is an integer number (1183362120).

Almost surely, 2^12655400065 is an apocalyptic number.

It is an amenable number.

12655400065 is a deficient number, since it is larger than the sum of its proper divisors (6278393855).

12655400065 is a wasteful number, since it uses less digits than its factorization.

12655400065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32871192.

The product of its (nonzero) digits is 36000, while the sum is 34.

Adding to 12655400065 its reverse (56000455621), we get a palindrome (68655855686).

The spelling of 12655400065 in words is "twelve billion, six hundred fifty-five million, four hundred thousand, sixty-five".