13656155252520 has 64 divisors (see below), whose sum is σ = 44692871739840. Its totient is φ = 3310583091200.

The previous prime is 13656155252513. The next prime is 13656155252521. The reversal of 13656155252520 is 2525255165631.

It is a self number, because there is not a number n which added to its sum of digits gives 13656155252520.

It is not an unprimeable number, because it can be changed into a prime (13656155252521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5172784761 + ... + 5172787400.

It is an arithmetic number, because the mean of its divisors is an integer number (698326120935).

Almost surely, 2^{13656155252520} is an apocalyptic number.

13656155252520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13656155252520 is an abundant number, since it is smaller than the sum of its proper divisors (31036716487320).

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

13656155252520 is a wasteful number, since it uses less digits than its factorization.

13656155252520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10345572186 (or 10345572182 counting only the distinct ones).

The product of its (nonzero) digits is 2700000, while the sum is 48.

The spelling of 13656155252520 in words is "thirteen trillion, six hundred fifty-six billion, one hundred fifty-five million, two hundred fifty-two thousand, five hundred twenty".