513720528049 has 3 divisors (see below), whose sum is σ = 513721244793. Its totient is φ = 513719811306.

The previous prime is 513720528029. The next prime is 513720528067. The reversal of 513720528049 is 940825027315.

The square root of 513720528049 is 716743.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a de Polignac number, because none of the positive numbers 2^k-513720528049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513720528029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 358372 + ... + 1075114.

It is an arithmetic number, because the mean of its divisors is an integer number (171240414931).

Almost surely, 2^513720528049 is an apocalyptic number.

513720528049 is the 716743-rd square number.

513720528049 is the 358372-nd centered octagonal number.

It is an amenable number.

513720528049 is a deficient number, since it is larger than the sum of its proper divisors (716744).

513720528049 is an frugal number, since it uses more digits than its factorization.

513720528049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1433486 (or 716743 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 513720528049 in words is "five hundred thirteen billion, seven hundred twenty million, five hundred twenty-eight thousand, forty-nine".