12537659657349 has 32 divisors (see below), whose sum is σ = 19552197120000. Its totient is φ = 7918403944752.

The previous prime is 12537659657333. The next prime is 12537659657377. The reversal of 12537659657349 is 94375695673521.

It is a happy number.

12537659657349 is a `hidden beast` number, since 1 + 2 + 5 + 3 + 7 + 6 + 5 + 9 + 6 + 573 + 49 = 666.

It is not a de Polignac number, because 12537659657349 - 2⁴ = 12537659657333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12537659657389) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45416274 + ... + 45691500.

It is an arithmetic number, because the mean of its divisors is an integer number (611006160000).

Almost surely, 2^{12537659657349} is an apocalyptic number.

12537659657349 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12537659657349 is a deficient number, since it is larger than the sum of its proper divisors (7014537462651).

12537659657349 is a wasteful number, since it uses less digits than its factorization.

12537659657349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364054 (or 364048 counting only the distinct ones).

The product of its digits is 1285956000, while the sum is 72.

The spelling of 12537659657349 in words is "twelve trillion, five hundred thirty-seven billion, six hundred fifty-nine million, six hundred fifty-seven thousand, three hundred forty-nine".