516542764889 has 2 divisors, whose sum is σ = 516542764890. Its totient is φ = 516542764888.

The previous prime is 516542764867. The next prime is 516542764967. The reversal of 516542764889 is 988467245615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 380763043600 + 135779721289 = 617060^2 + 368483^2 .

It is a cyclic number.

It is not a de Polignac number, because 516542764889 - 2²⁸ = 516274329433 is a prime.

It is not a weakly prime, because it can be changed into another prime (516542764819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258271382444 + 258271382445.

It is an arithmetic number, because the mean of its divisors is an integer number (258271382445).

Almost surely, 2^516542764889 is an apocalyptic number.

It is an amenable number.

516542764889 is a deficient number, since it is larger than the sum of its proper divisors (1).

516542764889 is an equidigital number, since it uses as much as digits as its factorization.

516542764889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116121600, while the sum is 65.

The spelling of 516542764889 in words is "five hundred sixteen billion, five hundred forty-two million, seven hundred sixty-four thousand, eight hundred eighty-nine".