12655673533637 has 4 divisors (see below), whose sum is σ = 12660554243340. Its totient is φ = 12650792823936.

The previous prime is 12655673533631. The next prime is 12655673533703. The reversal of 12655673533637 is 73633537655621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2420594542276 + 10235078991361 = 1555826^2 + 3199231^2 .

It is a cyclic number.

It is not a de Polignac number, because 12655673533637 - 2⁸ = 12655673533381 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12655673533637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12655673533631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2440350962 + ... + 2440356147.

It is an arithmetic number, because the mean of its divisors is an integer number (3165138560835).

Almost surely, 2^{12655673533637} is an apocalyptic number.

It is an amenable number.

12655673533637 is a deficient number, since it is larger than the sum of its proper divisors (4880709703).

12655673533637 is an equidigital number, since it uses as much as digits as its factorization.

12655673533637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4880709702.

The product of its digits is 214326000, while the sum is 62.

The spelling of 12655673533637 in words is "twelve trillion, six hundred fifty-five billion, six hundred seventy-three million, five hundred thirty-three thousand, six hundred thirty-seven".