555555555505 has 4 divisors (see below), whose sum is σ = 666666666612. Its totient is φ = 444444444400.

The previous prime is 555555555413. The next prime is 555555555551. The reversal of 555555555505 is 505555555555.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505555555555 = 5 ⋅101111111111.

It can be written as a sum of positive squares in 2 ways, for example, as 62064760384 + 493490795121 = 249128^2 + 702489^2 .

It is not a de Polignac number, because 555555555505 - 2²¹ = 555553458353 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55555555546 + ... + 55555555555.

It is an arithmetic number, because the mean of its divisors is an integer number (166666666653).

Almost surely, 2^555555555505 is an apocalyptic number.

It is an amenable number.

555555555505 is a deficient number, since it is larger than the sum of its proper divisors (111111111107).

555555555505 is a wasteful number, since it uses less digits than its factorization.

555555555505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111111111106.

The product of its (nonzero) digits is 48828125, while the sum is 55.

It can be divided in two parts, 55555555550 and 5, that added together give a palindrome (55555555555).

The spelling of 555555555505 in words is "five hundred fifty-five billion, five hundred fifty-five million, five hundred fifty-five thousand, five hundred five".