5771781889 has 2 divisors, whose sum is σ = 5771781890. Its totient is φ = 5771781888.

The previous prime is 5771781881. The next prime is 5771781907. The reversal of 5771781889 is 9881871775.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5763846400 + 7935489 = 75920^2 + 2817^2 .

It is a cyclic number.

It is not a de Polignac number, because 5771781889 - 2³ = 5771781881 is a prime.

It is not a weakly prime, because it can be changed into another prime (5771781881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2885890944 + 2885890945.

It is an arithmetic number, because the mean of its divisors is an integer number (2885890945).

Almost surely, 2^5771781889 is an apocalyptic number.

It is an amenable number.

5771781889 is a deficient number, since it is larger than the sum of its proper divisors (1).

5771781889 is an equidigital number, since it uses as much as digits as its factorization.

5771781889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7902720, while the sum is 61.

The square root of 5771781889 is about 75972.2442014187. The cubic root of 5771781889 is about 1793.7832748804.

The spelling of 5771781889 in words is "five billion, seven hundred seventy-one million, seven hundred eighty-one thousand, eight hundred eighty-nine".