10400042609 has 4 divisors (see below), whose sum is σ = 11345501040. Its totient is φ = 9454584180.

The previous prime is 10400042603. The next prime is 10400042623. The reversal of 10400042609 is 90624000401.

10400042609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 10400042609 - 2⁸ = 10400042353 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10400042603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 472729199 + ... + 472729220.

It is an arithmetic number, because the mean of its divisors is an integer number (2836375260).

Almost surely, 2^10400042609 is an apocalyptic number.

It is an amenable number.

10400042609 is a deficient number, since it is larger than the sum of its proper divisors (945458431).

10400042609 is an equidigital number, since it uses as much as digits as its factorization.

10400042609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945458430.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 10400042609 in words is "ten billion, four hundred million, forty-two thousand, six hundred nine".