42109801145 has 8 divisors (see below), whose sum is σ = 50642336904. Its totient is φ = 33614123904.

The previous prime is 42109801109. The next prime is 42109801157. The reversal of 42109801145 is 54110890124.

It can be written as a sum of positive squares in 4 ways, for example, as 9366174841 + 32743626304 = 96779^2 + 180952^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42109801145 - 2⁶ = 42109801081 is a prime.

It is a super-2 number, since 2×42109801145² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9212114 + ... + 9216683.

It is an arithmetic number, because the mean of its divisors is an integer number (6330292113).

Almost surely, 2^42109801145 is an apocalyptic number.

It is an amenable number.

42109801145 is a deficient number, since it is larger than the sum of its proper divisors (8532535759).

42109801145 is a wasteful number, since it uses less digits than its factorization.

42109801145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18429259.

The product of its (nonzero) digits is 11520, while the sum is 35.

The spelling of 42109801145 in words is "forty-two billion, one hundred nine million, eight hundred one thousand, one hundred forty-five".