516261761 has 6 divisors (see below), whose sum is σ = 522885762. Its totient is φ = 509720640.

The previous prime is 516261737. The next prime is 516261773. The reversal of 516261761 is 167162615.

It can be written as a sum of positive squares in only one way, i.e., 356492161 + 159769600 = 18881^2 + 12640^2 .

It is a de Polignac number, because none of the positive numbers 2^k-516261761 is a prime.

It is a super-2 number, since 2×516261761² = 533052411741642242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (516261061) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35120 + ... + 47601.

It is an arithmetic number, because the mean of its divisors is an integer number (87147627).

Almost surely, 2^516261761 is an apocalyptic number.

It is an amenable number.

516261761 is a deficient number, since it is larger than the sum of its proper divisors (6624001).

516261761 is an frugal number, since it uses more digits than its factorization.

516261761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82879 (or 82800 counting only the distinct ones).

The product of its digits is 15120, while the sum is 35.

The square root of 516261761 is about 22721.3943454182. The cubic root of 516261761 is about 802.2135368569.

The spelling of 516261761 in words is "five hundred sixteen million, two hundred sixty-one thousand, seven hundred sixty-one".