100005040505 has 4 divisors (see below), whose sum is σ = 120006048612. Its totient is φ = 80004032400.

The previous prime is 100005040481. The next prime is 100005040507. The reversal of 100005040505 is 505040500001.

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 71669714944 + 28335325561 = 267712^2 + 168331^2 .

It is not a de Polignac number, because 100005040505 - 2¹⁸ = 100004778361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100005040507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10000504046 + ... + 10000504055.

It is an arithmetic number, because the mean of its divisors is an integer number (30001512153).

Almost surely, 2^100005040505 is an apocalyptic number.

It is an amenable number.

100005040505 is a deficient number, since it is larger than the sum of its proper divisors (20001008107).

100005040505 is an equidigital number, since it uses as much as digits as its factorization.

100005040505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20001008106.

The product of its (nonzero) digits is 500, while the sum is 20.

Adding to 100005040505 its reverse (505040500001), we get a palindrome (605045540506).

It can be divided in two parts, 10000 and 5040505, that added together give a palindrome (5050505).

The spelling of 100005040505 in words is "one hundred billion, five million, forty thousand, five hundred five".