516729861 has 40 divisors (see below), whose sum is σ = 784602720. Its totient is φ = 338880672.

The previous prime is 516729791. The next prime is 516729877. The reversal of 516729861 is 168927615.

516729861 is a `hidden beast` number, since 516 + 72 + 9 + 8 + 61 = 666.

It is not a de Polignac number, because 516729861 - 2⁹ = 516729349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516721861) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2276230 + ... + 2276456.

It is an arithmetic number, because the mean of its divisors is an integer number (19615068).

Almost surely, 2^516729861 is an apocalyptic number.

It is an amenable number.

516729861 is a deficient number, since it is larger than the sum of its proper divisors (267872859).

516729861 is a wasteful number, since it uses less digits than its factorization.

516729861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575 (or 566 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 516729861 is about 22731.6928758067. The cubic root of 516729861 is about 802.4559221139.

The spelling of 516729861 in words is "five hundred sixteen million, seven hundred twenty-nine thousand, eight hundred sixty-one".