12657732857055 has 576 divisors, whose sum is σ = 27543716928000. Its totient is φ = 5333650882560.

The previous prime is 12657732856987. The next prime is 12657732857083. The reversal of 12657732857055 is 55075823775621.

It is a happy number.

12657732857055 is a `hidden beast` number, since 1 + 2 + 6 + 5 + 7 + 7 + 3 + 2 + 8 + 570 + 55 = 666.

It is not a de Polignac number, because 12657732857055 - 2¹² = 12657732852959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12657732856983 and 12657732857001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 575 ways as a sum of consecutive naturals, for example, 14432990277 + ... + 14432991153.

It is an arithmetic number, because the mean of its divisors is an integer number (47818953000).

Almost surely, 2^{12657732857055} is an apocalyptic number.

12657732857055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12657732857055 is an abundant number, since it is smaller than the sum of its proper divisors (14885984070945).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12657732857055 is a wasteful number, since it uses less digits than its factorization.

12657732857055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120 (or 1106 counting only the distinct ones).

The product of its (nonzero) digits is 123480000, while the sum is 63.

The spelling of 12657732857055 in words is "twelve trillion, six hundred fifty-seven billion, seven hundred thirty-two million, eight hundred fifty-seven thousand, fifty-five".