500555500001 has 2 divisors, whose sum is σ = 500555500002. Its totient is φ = 500555500000.

The previous prime is 500555499991. The next prime is 500555500021. The reversal of 500555500001 is 100005555005.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 428207949376 + 72347550625 = 654376^2 + 268975^2 .

It is a cyclic number.

It is not a de Polignac number, because 500555500001 - 2¹⁰ = 500555498977 is a prime.

It is a super-2 number, since 2×500555500001² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (500555500021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250277750000 + 250277750001.

It is an arithmetic number, because the mean of its divisors is an integer number (250277750001).

Almost surely, 2^500555500001 is an apocalyptic number.

It is an amenable number.

500555500001 is a deficient number, since it is larger than the sum of its proper divisors (1).

500555500001 is an equidigital number, since it uses as much as digits as its factorization.

500555500001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3125, while the sum is 26.

The spelling of 500555500001 in words is "five hundred billion, five hundred fifty-five million, five hundred thousand, one".