3045457556221 has 2 divisors, whose sum is σ = 3045457556222. Its totient is φ = 3045457556220.

The previous prime is 3045457556213. The next prime is 3045457556299. The reversal of 3045457556221 is 1226557545403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2980439696025 + 65017860196 = 1726395^2 + 254986^2 .

It is a cyclic number.

It is not a de Polignac number, because 3045457556221 - 2³ = 3045457556213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3045457556201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1522728778110 + 1522728778111.

It is an arithmetic number, because the mean of its divisors is an integer number (1522728778111).

Almost surely, 2^{3045457556221} is an apocalyptic number.

It is an amenable number.

3045457556221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3045457556221 is an equidigital number, since it uses as much as digits as its factorization.

3045457556221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040000, while the sum is 49.

The spelling of 3045457556221 in words is "three trillion, forty-five billion, four hundred fifty-seven million, five hundred fifty-six thousand, two hundred twenty-one".