10001040505 has 4 divisors (see below), whose sum is σ = 12001248612. Its totient is φ = 8000832400.

The previous prime is 10001040433. The next prime is 10001040509. The reversal of 10001040505 is 50504010001.

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 5641211664 + 4359828841 = 75108^2 + 66029^2 .

It is not a de Polignac number, because 10001040505 - 2⁷ = 10001040377 is a prime.

It is a super-2 number, since 2×10001040505² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10001040509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1000104046 + ... + 1000104055.

It is an arithmetic number, because the mean of its divisors is an integer number (3000312153).

Almost surely, 2^10001040505 is an apocalyptic number.

It is an amenable number.

10001040505 is a deficient number, since it is larger than the sum of its proper divisors (2000208107).

10001040505 is an equidigital number, since it uses as much as digits as its factorization.

10001040505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000208106.

The product of its (nonzero) digits is 100, while the sum is 16.

Adding to 10001040505 its reverse (50504010001), we get a palindrome (60505050506).

The spelling of 10001040505 in words is "ten billion, one million, forty thousand, five hundred five".