55550500555 has 16 divisors (see below), whose sum is σ = 72831052800. Its totient is φ = 40339032160.

The previous prime is 55550500543. The next prime is 55550500573. The reversal of 55550500555 is 55500505555.

It is not a de Polignac number, because 55550500555 - 2⁹ = 55550500043 is a prime.

It is a super-2 number, since 2×55550500555² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 730075 + ... + 802564.

It is an arithmetic number, because the mean of its divisors is an integer number (4551940800).

Almost surely, 2^55550500555 is an apocalyptic number.

55550500555 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55550500555 is a deficient number, since it is larger than the sum of its proper divisors (17280552245).

55550500555 is a wasteful number, since it uses less digits than its factorization.

55550500555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1533314.

The product of its (nonzero) digits is 390625, while the sum is 40.

Subtracting from 55550500555 its reverse (55500505555), we obtain a triangular number (49995000 = T₉₉₉₉).

The spelling of 55550500555 in words is "fifty-five billion, five hundred fifty million, five hundred thousand, five hundred fifty-five".