5129984912809 has 9 divisors (see below), whose sum is σ = 5136940920951. Its totient is φ = 5123038320360.

The previous prime is 5129984912797. The next prime is 5129984912863. The reversal of 5129984912809 is 9082194899215.

The square root of 5129984912809 is 2264947.

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., 3874303305625 + 1255681607184 = 1968325^2 + 1120572^2 .

It is not a de Polignac number, because 5129984912809 - 2¹⁷ = 5129984781737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5129984912909) 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, 2801738524 + ... + 2801740354.

It is an arithmetic number, because the mean of its divisors is an integer number (570771213439).

Almost surely, 2^{5129984912809} is an apocalyptic number.

5129984912809 is the 2264947-th square number.

5129984912809 is the 1132474-th centered octagonal number.

It is an amenable number.

5129984912809 is a deficient number, since it is larger than the sum of its proper divisors (6956008142).

5129984912809 is an frugal number, since it uses more digits than its factorization.

5129984912809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6136 (or 3068 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 67.

The spelling of 5129984912809 in words is "five trillion, one hundred twenty-nine billion, nine hundred eighty-four million, nine hundred twelve thousand, eight hundred nine".