13556530721852 has 24 divisors (see below), whose sum is σ = 24010353163776. Its totient is φ = 6696433858608.

The previous prime is 13556530721831. The next prime is 13556530721957. The reversal of 13556530721852 is 25812703565531.

It is a junction number, because it is equal to n+sod(n) for n = 13556530721794 and 13556530721803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13522133 + ... + 14490035.

It is an arithmetic number, because the mean of its divisors is an integer number (1000431381824).

Almost surely, 2^{13556530721852} is an apocalyptic number.

It is an amenable number.

13556530721852 is a deficient number, since it is larger than the sum of its proper divisors (10453822441924).

13556530721852 is a wasteful number, since it uses less digits than its factorization.

13556530721852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010177 (or 1010175 counting only the distinct ones).

The product of its (nonzero) digits is 7560000, while the sum is 53.

The spelling of 13556530721852 in words is "thirteen trillion, five hundred fifty-six billion, five hundred thirty million, seven hundred twenty-one thousand, eight hundred fifty-two".