42091789945 has 8 divisors (see below), whose sum is σ = 50546260800. Its totient is φ = 33649356720.

The previous prime is 42091789939. The next prime is 42091789951. The reversal of 42091789945 is 54998719024.

It is an interprime number because it is at equal distance from previous prime (42091789939) and next prime (42091789951).

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

It is not a de Polignac number, because 42091789945 - 2³ = 42091789937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42091789945.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3001711 + ... + 3015700.

It is an arithmetic number, because the mean of its divisors is an integer number (6318282600).

Almost surely, 2^42091789945 is an apocalyptic number.

It is an amenable number.

42091789945 is a deficient number, since it is larger than the sum of its proper divisors (8454470855).

42091789945 is a wasteful number, since it uses less digits than its factorization.

42091789945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6018815.

The product of its (nonzero) digits is 6531840, while the sum is 58.

The spelling of 42091789945 in words is "forty-two billion, ninety-one million, seven hundred eighty-nine thousand, nine hundred forty-five".