513563660123 has 2 divisors, whose sum is σ = 513563660124. Its totient is φ = 513563660122.

The previous prime is 513563660041. The next prime is 513563660161. The reversal of 513563660123 is 321066365315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 513563660123 - 2²⁸ = 513295224667 is a prime.

It is not a weakly prime, because it can be changed into another prime (513563662123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256781830061 + 256781830062.

It is an arithmetic number, because the mean of its divisors is an integer number (256781830062).

Almost surely, 2^513563660123 is an apocalyptic number.

513563660123 is a deficient number, since it is larger than the sum of its proper divisors (1).

513563660123 is an equidigital number, since it uses as much as digits as its factorization.

513563660123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 291600, while the sum is 41.

The spelling of 513563660123 in words is "five hundred thirteen billion, five hundred sixty-three million, six hundred sixty thousand, one hundred twenty-three".