42109178109 has 32 divisors (see below), whose sum is σ = 60273745920. Its totient is φ = 26055374592.

The previous prime is 42109178093. The next prime is 42109178119. The reversal of 42109178109 is 90187190124.

It is not a de Polignac number, because 42109178109 - 2⁴ = 42109178093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42109178119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3567832 + ... + 3579614.

It is an arithmetic number, because the mean of its divisors is an integer number (1883554560).

Almost surely, 2^42109178109 is an apocalyptic number.

It is an amenable number.

42109178109 is a deficient number, since it is larger than the sum of its proper divisors (18164567811).

42109178109 is a wasteful number, since it uses less digits than its factorization.

42109178109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12769.

The product of its (nonzero) digits is 36288, while the sum is 42.

The spelling of 42109178109 in words is "forty-two billion, one hundred nine million, one hundred seventy-eight thousand, one hundred nine".