545715134521 has 2 divisors, whose sum is σ = 545715134522. Its totient is φ = 545715134520.

The previous prime is 545715134513. The next prime is 545715134557. The reversal of 545715134521 is 125431517545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 310694760000 + 235020374521 = 557400^2 + 484789^2 .

It is a cyclic number.

It is not a de Polignac number, because 545715134521 - 2³ = 545715134513 is a prime.

It is not a weakly prime, because it can be changed into another prime (545715134621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272857567260 + 272857567261.

It is an arithmetic number, because the mean of its divisors is an integer number (272857567261).

Almost surely, 2^545715134521 is an apocalyptic number.

It is an amenable number.

545715134521 is a deficient number, since it is larger than the sum of its proper divisors (1).

545715134521 is an equidigital number, since it uses as much as digits as its factorization.

545715134521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 420000, while the sum is 43.

The spelling of 545715134521 in words is "five hundred forty-five billion, seven hundred fifteen million, one hundred thirty-four thousand, five hundred twenty-one".