545469122521 has 2 divisors, whose sum is σ = 545469122522. Its totient is φ = 545469122520.

The previous prime is 545469122519. The next prime is 545469122551. The reversal of 545469122521 is 125221964545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 372662632521 + 172806490000 = 610461^2 + 415700^2 .

It is a cyclic number.

It is not a de Polignac number, because 545469122521 - 2¹ = 545469122519 is a prime.

Together with 545469122519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (545469122501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272734561260 + 272734561261.

It is an arithmetic number, because the mean of its divisors is an integer number (272734561261).

Almost surely, 2^545469122521 is an apocalyptic number.

It is an amenable number.

545469122521 is a deficient number, since it is larger than the sum of its proper divisors (1).

545469122521 is an equidigital number, since it uses as much as digits as its factorization.

545469122521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864000, while the sum is 46.

The spelling of 545469122521 in words is "five hundred forty-five billion, four hundred sixty-nine million, one hundred twenty-two thousand, five hundred twenty-one".