555780101 has 4 divisors (see below), whose sum is σ = 566266572. Its totient is φ = 545293632.

The previous prime is 555780097. The next prime is 555780151. The reversal of 555780101 is 101087555.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 301855876 + 253924225 = 17374^2 + 15935^2 .

It is a cyclic number.

It is not a de Polignac number, because 555780101 - 2² = 555780097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555780151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5243156 + ... + 5243261.

It is an arithmetic number, because the mean of its divisors is an integer number (141566643).

Almost surely, 2^555780101 is an apocalyptic number.

It is an amenable number.

555780101 is a deficient number, since it is larger than the sum of its proper divisors (10486471).

555780101 is a wasteful number, since it uses less digits than its factorization.

555780101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10486470.

The product of its (nonzero) digits is 7000, while the sum is 32.

The square root of 555780101 is about 23574.9888865297. The cubic root of 555780101 is about 822.1814318623.

It can be divided in two parts, 5557 and 80101, that added together give a palindrome (85658).

The spelling of 555780101 in words is "five hundred fifty-five million, seven hundred eighty thousand, one hundred one".