618544859 has 2 divisors, whose sum is σ = 618544860. Its totient is φ = 618544858.

The previous prime is 618544853. The next prime is 618544889. The reversal of 618544859 is 958445816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 618544859 - 2²⁰ = 617496283 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (618544853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309272429 + 309272430.

It is an arithmetic number, because the mean of its divisors is an integer number (309272430).

Almost surely, 2^618544859 is an apocalyptic number.

618544859 is a deficient number, since it is larger than the sum of its proper divisors (1).

618544859 is an equidigital number, since it uses as much as digits as its factorization.

618544859 is an odious number, because the sum of its binary digits is odd.

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

The square root of 618544859 is about 24870.5620965832. The cubic root of 618544859 is about 852.0342781767.

The spelling of 618544859 in words is "six hundred eighteen million, five hundred forty-four thousand, eight hundred fifty-nine".