5779397781 has 12 divisors (see below), whose sum is σ = 8354512140. Its totient is φ = 3849935040.

The previous prime is 5779397777. The next prime is 5779397783. The reversal of 5779397781 is 1877939775.

It can be written as a sum of positive squares in 2 ways, for example, as 5359557681 + 419840100 = 73209^2 + 20490^2 .

It is not a de Polignac number, because 5779397781 - 2² = 5779397777 is a prime.

It is a super-2 number, since 2×5779397781² = 66802877422055447922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5779397783) 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, 237490 + ... + 260691.

It is an arithmetic number, because the mean of its divisors is an integer number (696209345).

Almost surely, 2^5779397781 is an apocalyptic number.

It is an amenable number.

5779397781 is a deficient number, since it is larger than the sum of its proper divisors (2575114359).

5779397781 is a wasteful number, since it uses less digits than its factorization.

5779397781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499476 (or 499473 counting only the distinct ones).

The product of its digits is 23337720, while the sum is 63.

The square root of 5779397781 is about 76022.3505358786. The cubic root of 5779397781 is about 1794.5718964684.

The spelling of 5779397781 in words is "five billion, seven hundred seventy-nine million, three hundred ninety-seven thousand, seven hundred eighty-one".