4791821694529 has 9 divisors (see below), whose sum is σ = 4800995887779. Its totient is φ = 4782665011320.

The previous prime is 4791821694521. The next prime is 4791821694559. The reversal of 4791821694529 is 9254961281974.

The square root of 4791821694529 is 2189023.

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

It can be written as a sum of positive squares in only one way, i.e., 15621250225 + 4776200444304 = 124985^2 + 2185452^2 .

It is not a de Polignac number, because 4791821694529 - 2³ = 4791821694521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4791821694521) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1341869314 + ... + 1341872884.

It is an arithmetic number, because the mean of its divisors is an integer number (533443987531).

Almost surely, 2^{4791821694529} is an apocalyptic number.

4791821694529 is the 2189023-rd square number.

4791821694529 is the 1094512-nd centered octagonal number.

It is an amenable number.

4791821694529 is a deficient number, since it is larger than the sum of its proper divisors (9174193250).

4791821694529 is an frugal number, since it uses more digits than its factorization.

4791821694529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8368 (or 4184 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 67.

The spelling of 4791821694529 in words is "four trillion, seven hundred ninety-one billion, eight hundred twenty-one million, six hundred ninety-four thousand, five hundred twenty-nine".