2685047355521 has 4 divisors (see below), whose sum is σ = 2698540056000. Its totient is φ = 2671554655044.

The previous prime is 2685047355509. The next prime is 2685047355611. The reversal of 2685047355521 is 1255537405862.

2685047355521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2685047355521 - 2⁶ = 2685047355457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2685047315521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6746349941 + ... + 6746350338.

It is an arithmetic number, because the mean of its divisors is an integer number (674635014000).

Almost surely, 2^{2685047355521} is an apocalyptic number.

It is an amenable number.

2685047355521 is a deficient number, since it is larger than the sum of its proper divisors (13492700479).

2685047355521 is a wasteful number, since it uses less digits than its factorization.

2685047355521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13492700478.

The product of its (nonzero) digits is 10080000, while the sum is 53.

The spelling of 2685047355521 in words is "two trillion, six hundred eighty-five billion, forty-seven million, three hundred fifty-five thousand, five hundred twenty-one".