513868868311 has 2 divisors, whose sum is σ = 513868868312. Its totient is φ = 513868868310.

The previous prime is 513868868297. The next prime is 513868868351. The reversal of 513868868311 is 113868868315.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-513868868311 is a prime.

It is a super-2 number, since 2×513868868311² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513868868351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256934434155 + 256934434156.

It is an arithmetic number, because the mean of its divisors is an integer number (256934434156).

Almost surely, 2^513868868311 is an apocalyptic number.

513868868311 is a deficient number, since it is larger than the sum of its proper divisors (1).

513868868311 is an equidigital number, since it uses as much as digits as its factorization.

513868868311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6635520, while the sum is 58.

The spelling of 513868868311 in words is "five hundred thirteen billion, eight hundred sixty-eight million, eight hundred sixty-eight thousand, three hundred eleven".