12661201511344 has 40 divisors (see below), whose sum is σ = 24619550497920. Its totient is φ = 6307771276800.

The previous prime is 12661201511341. The next prime is 12661201511389. The reversal of 12661201511344 is 44311510216621.

12661201511344 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12661201511341) 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, 116972289 + ... + 117080479.

It is an arithmetic number, because the mean of its divisors is an integer number (615488762448).

Almost surely, 2^{12661201511344} is an apocalyptic number.

It is an amenable number.

12661201511344 is a deficient number, since it is larger than the sum of its proper divisors (11958348986576).

12661201511344 is a wasteful number, since it uses less digits than its factorization.

12661201511344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134509 (or 134503 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

Adding to 12661201511344 its reverse (44311510216621), we get a palindrome (56972711727965).

The spelling of 12661201511344 in words is "twelve trillion, six hundred sixty-one billion, two hundred one million, five hundred eleven thousand, three hundred forty-four".