516322645 has 8 divisors (see below), whose sum is σ = 625272120. Its totient is φ = 409268160.

The previous prime is 516322643. The next prime is 516322669. The reversal of 516322645 is 546223615.

It can be written as a sum of positive squares in 4 ways, for example, as 41692849 + 474629796 = 6457^2 + 21786^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 516322645 - 2¹ = 516322643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 516322645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516322643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 473146 + ... + 474235.

It is an arithmetic number, because the mean of its divisors is an integer number (78159015).

Almost surely, 2^516322645 is an apocalyptic number.

It is an amenable number.

516322645 is a deficient number, since it is larger than the sum of its proper divisors (108949475).

516322645 is a wasteful number, since it uses less digits than its factorization.

516322645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947495.

The product of its digits is 43200, while the sum is 34.

The square root of 516322645 is about 22722.7341004554. The cubic root of 516322645 is about 802.2450712791.

The spelling of 516322645 in words is "five hundred sixteen million, three hundred twenty-two thousand, six hundred forty-five".