516388465 has 16 divisors (see below), whose sum is σ = 637288272. Its totient is φ = 401393664.

The previous prime is 516388463. The next prime is 516388489. The reversal of 516388465 is 564883615.

It can be written as a sum of positive squares in 8 ways, for example, as 122921569 + 393466896 = 11087^2 + 19836^2 .

It is a cyclic number.

It is not a de Polignac number, because 516388465 - 2¹ = 516388463 is a prime.

It is a super-3 number, since 3×516388465³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (516388463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179317 + ... + 182173.

It is an arithmetic number, because the mean of its divisors is an integer number (39830517).

Almost surely, 2^516388465 is an apocalyptic number.

It is an amenable number.

516388465 is a deficient number, since it is larger than the sum of its proper divisors (120899807).

516388465 is a wasteful number, since it uses less digits than its factorization.

516388465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3876.

The product of its digits is 691200, while the sum is 46.

The square root of 516388465 is about 22724.1823835314. The cubic root of 516388465 is about 802.2791594780.

The spelling of 516388465 in words is "five hundred sixteen million, three hundred eighty-eight thousand, four hundred sixty-five".