555779801 has 2 divisors, whose sum is σ = 555779802. Its totient is φ = 555779800.

The previous prime is 555779779. The next prime is 555779821. The reversal of 555779801 is 108977555.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 455779801 + 100000000 = 21349^2 + 10000^2 .

It is a cyclic number.

It is not a de Polignac number, because 555779801 - 2¹⁰ = 555778777 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (555779821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277889900 + 277889901.

It is an arithmetic number, because the mean of its divisors is an integer number (277889901).

Almost surely, 2^555779801 is an apocalyptic number.

It is an amenable number.

555779801 is a deficient number, since it is larger than the sum of its proper divisors (1).

555779801 is an equidigital number, since it uses as much as digits as its factorization.

555779801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 441000, while the sum is 47.

The square root of 555779801 is about 23574.9825238535. The cubic root of 555779801 is about 822.1812839294.

It can be divided in two parts, 5557 and 79801, that added together give a palindrome (85358).

The spelling of 555779801 in words is "five hundred fifty-five million, seven hundred seventy-nine thousand, eight hundred one".