5451840689 has 2 divisors, whose sum is σ = 5451840690. Its totient is φ = 5451840688.

The previous prime is 5451840649. The next prime is 5451840733. The reversal of 5451840689 is 9860481545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4858090000 + 593750689 = 69700^2 + 24367^2 .

It is a cyclic number.

It is not a de Polignac number, because 5451840689 - 2²⁸ = 5183405233 is a prime.

It is not a weakly prime, because it can be changed into another prime (5451840629) 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 as a sum of consecutive naturals, namely, 2725920344 + 2725920345.

It is an arithmetic number, because the mean of its divisors is an integer number (2725920345).

Almost surely, 2^5451840689 is an apocalyptic number.

It is an amenable number.

5451840689 is a deficient number, since it is larger than the sum of its proper divisors (1).

5451840689 is an equidigital number, since it uses as much as digits as its factorization.

5451840689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1382400, while the sum is 50.

The square root of 5451840689 is about 73836.5809677019. The cubic root of 5451840689 is about 1760.0069611682.

The spelling of 5451840689 in words is "five billion, four hundred fifty-one million, eight hundred forty thousand, six hundred eighty-nine".