6615533045321 has 4 divisors (see below), whose sum is σ = 6843654874500. Its totient is φ = 6387411216144.

The previous prime is 6615533045311. The next prime is 6615533045333. The reversal of 6615533045321 is 1235403355166.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5671847086096 + 943685959225 = 2381564^2 + 971435^2 .

It is a cyclic number.

It is not a de Polignac number, because 6615533045321 - 2³⁴ = 6598353176137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6615533045311) 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 3 ways as a sum of consecutive naturals, for example, 114060914546 + ... + 114060914603.

It is an arithmetic number, because the mean of its divisors is an integer number (1710913718625).

Almost surely, 2^{6615533045321} is an apocalyptic number.

It is an amenable number.

6615533045321 is a deficient number, since it is larger than the sum of its proper divisors (228121829179).

6615533045321 is a wasteful number, since it uses less digits than its factorization.

6615533045321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228121829178.

The product of its (nonzero) digits is 972000, while the sum is 44.

The spelling of 6615533045321 in words is "six trillion, six hundred fifteen billion, five hundred thirty-three million, forty-five thousand, three hundred twenty-one".