516939305305 has 4 divisors (see below), whose sum is σ = 620327166372. Its totient is φ = 413551444240.

The previous prime is 516939305279. The next prime is 516939305383. The reversal of 516939305305 is 503503939615.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 151485202521 + 365454102784 = 389211^2 + 604528^2 .

It is not a de Polignac number, because 516939305305 - 2⁹ = 516939304793 is a prime.

It is a super-2 number, since 2×516939305305² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51693930526 + ... + 51693930535.

It is an arithmetic number, because the mean of its divisors is an integer number (155081791593).

Almost surely, 2^516939305305 is an apocalyptic number.

It is an amenable number.

516939305305 is a deficient number, since it is larger than the sum of its proper divisors (103387861067).

516939305305 is a wasteful number, since it uses less digits than its factorization.

516939305305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103387861066.

The product of its (nonzero) digits is 1640250, while the sum is 49.

The spelling of 516939305305 in words is "five hundred sixteen billion, nine hundred thirty-nine million, three hundred five thousand, three hundred five".