5491771281 has 12 divisors (see below), whose sum is σ = 8126036100. Its totient is φ = 3571883520.

The previous prime is 5491771247. The next prime is 5491771283. The reversal of 5491771281 is 1821771945.

It is a happy number.

5491771281 is a `hidden beast` number, since 5 + 491 + 77 + 12 + 81 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3237041025 + 2254730256 = 56895^2 + 47484^2 .

It is not a de Polignac number, because 5491771281 - 2⁶ = 5491771217 is a prime.

It is a super-2 number, since 2×5491771281² = 60319103605632761922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5491771283) 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 11 ways as a sum of consecutive naturals, for example, 7441056 + ... + 7441793.

It is an arithmetic number, because the mean of its divisors is an integer number (677169675).

Almost surely, 2^5491771281 is an apocalyptic number.

It is an amenable number.

5491771281 is a deficient number, since it is larger than the sum of its proper divisors (2634264819).

5491771281 is a wasteful number, since it uses less digits than its factorization.

5491771281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14882896 (or 14882893 counting only the distinct ones).

The product of its digits is 141120, while the sum is 45.

The square root of 5491771281 is about 74106.4860926491. The cubic root of 5491771281 is about 1764.2934178409.

The spelling of 5491771281 in words is "five billion, four hundred ninety-one million, seven hundred seventy-one thousand, two hundred eighty-one".