10005605509 has 4 divisors (see below), whose sum is σ = 10006403680. Its totient is φ = 10004807340.

The previous prime is 10005605507. The next prime is 10005605563. The reversal of 10005605509 is 90550650001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10005605509 - 2¹ = 10005605507 is a prime.

It is a super-2 number, since 2×10005605509² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10005605507) 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, 379977 + ... + 405454.

It is an arithmetic number, because the mean of its divisors is an integer number (2501600920).

Almost surely, 2^10005605509 is an apocalyptic number.

It is an amenable number.

10005605509 is a deficient number, since it is larger than the sum of its proper divisors (798171).

10005605509 is an equidigital number, since it uses as much as digits as its factorization.

10005605509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798170.

The product of its (nonzero) digits is 6750, while the sum is 31.

The spelling of 10005605509 in words is "ten billion, five million, six hundred five thousand, five hundred nine".