42909434905 has 32 divisors (see below), whose sum is σ = 53098911360. Its totient is φ = 33269322240.

The previous prime is 42909434873. The next prime is 42909434929. The reversal of 42909434905 is 50943490924.

It is a happy number.

It is not a de Polignac number, because 42909434905 - 2⁵ = 42909434873 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 16295469 + ... + 16298101.

It is an arithmetic number, because the mean of its divisors is an integer number (1659340980).

Almost surely, 2^42909434905 is an apocalyptic number.

It is an amenable number.

42909434905 is a deficient number, since it is larger than the sum of its proper divisors (10189476455).

42909434905 is a wasteful number, since it uses less digits than its factorization.

42909434905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3241.

The product of its (nonzero) digits is 1399680, while the sum is 49.

The spelling of 42909434905 in words is "forty-two billion, nine hundred nine million, four hundred thirty-four thousand, nine hundred five".