545215123513 has 2 divisors, whose sum is σ = 545215123514. Its totient is φ = 545215123512.

The previous prime is 545215123507. The next prime is 545215123549. The reversal of 545215123513 is 315321512545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 497831847184 + 47383276329 = 705572^2 + 217677^2 .

It is a cyclic number.

It is not a de Polignac number, because 545215123513 - 2²¹ = 545213026361 is a prime.

It is a super-2 number, since 2×545215123513² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (545215123553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272607561756 + 272607561757.

It is an arithmetic number, because the mean of its divisors is an integer number (272607561757).

Almost surely, 2^545215123513 is an apocalyptic number.

It is an amenable number.

545215123513 is a deficient number, since it is larger than the sum of its proper divisors (1).

545215123513 is an equidigital number, since it uses as much as digits as its factorization.

545215123513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90000, while the sum is 37.

The spelling of 545215123513 in words is "five hundred forty-five billion, two hundred fifteen million, one hundred twenty-three thousand, five hundred thirteen".