12661351445613 has 64 divisors (see below), whose sum is σ = 18771837380352. Its totient is φ = 7541301381120.

The previous prime is 12661351445573. The next prime is 12661351445657. The reversal of 12661351445613 is 31654415316621.

It is not a de Polignac number, because 12661351445613 - 2¹² = 12661351441517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12661351445663) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 161381431 + ... + 161459867.

It is an arithmetic number, because the mean of its divisors is an integer number (293309959068).

Almost surely, 2^{12661351445613} is an apocalyptic number.

12661351445613 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12661351445613 is a deficient number, since it is larger than the sum of its proper divisors (6110485934739).

12661351445613 is a wasteful number, since it uses less digits than its factorization.

12661351445613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79294.

The product of its digits is 1555200, while the sum is 48.

The spelling of 12661351445613 in words is "twelve trillion, six hundred sixty-one billion, three hundred fifty-one million, four hundred forty-five thousand, six hundred thirteen".