12720631728357 has 12 divisors (see below), whose sum is σ = 20999138091360. Its totient is φ = 7268932416168.

The previous prime is 12720631728323. The next prime is 12720631728373. The reversal of 12720631728357 is 75382713602721.

12720631728357 is a `hidden beast` number, since 1 + 27 + 20 + 6 + 317 + 283 + 5 + 7 = 666.

It is not a de Polignac number, because 12720631728357 - 2⁶ = 12720631728293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12720631728157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100957394607 + ... + 100957394732.

It is an arithmetic number, because the mean of its divisors is an integer number (1749928174280).

Almost surely, 2^{12720631728357} is an apocalyptic number.

It is an amenable number.

12720631728357 is a deficient number, since it is larger than the sum of its proper divisors (8278506363003).

12720631728357 is a wasteful number, since it uses less digits than its factorization.

12720631728357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201914789352 (or 201914789349 counting only the distinct ones).

The product of its (nonzero) digits is 5927040, while the sum is 54.

The spelling of 12720631728357 in words is "twelve trillion, seven hundred twenty billion, six hundred thirty-one million, seven hundred twenty-eight thousand, three hundred fifty-seven".