5129281161 has 9 divisors (see below), whose sum is σ = 7409272039. Its totient is φ = 3419377536.

The previous prime is 5129281153. The next prime is 5129281169. The reversal of 5129281161 is 1611829215.

The square root of 5129281161 is 71619.

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

5129281161 is a `hidden beast` number, since 512 + 9 + 2 + 81 + 1 + 61 = 666.

It is an interprime number because it is at equal distance from previous prime (5129281153) and next prime (5129281169).

It can be written as a sum of positive squares in only one way, i.e., 632774025 + 4496507136 = 25155^2 + 67056^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 5129281161 - 2³ = 5129281153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5129281169) 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 8 ways as a sum of consecutive naturals, for example, 202921 + ... + 226793.

Almost surely, 2^5129281161 is an apocalyptic number.

5129281161 is the 71619-th square number.

5129281161 is the 35810-th centered octagonal number.

It is an amenable number.

5129281161 is a deficient number, since it is larger than the sum of its proper divisors (2279990878).

5129281161 is an frugal number, since it uses more digits than its factorization.

5129281161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47752 (or 23876 counting only the distinct ones).

The product of its digits is 8640, while the sum is 36.

The cubic root of 5129281161 is about 1724.5885637523.

Multiplying 5129281161 by its sum of digits (36), we get a square (184654121796 = 429714²).

It can be divided in two parts, 512928 and 1161, that added together give a square (514089 = 717²).

The spelling of 5129281161 in words is "five billion, one hundred twenty-nine million, two hundred eighty-one thousand, one hundred sixty-one".