42419921581 has 8 divisors (see below), whose sum is σ = 43333254144. Its totient is φ = 41507038320.

The previous prime is 42419921573. The next prime is 42419921603. The reversal of 42419921581 is 18512991424.

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 42419921581 - 2³ = 42419921573 is a prime.

It is a super-2 number, since 2×42419921581² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42419921521) 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 7 ways as a sum of consecutive naturals, for example, 82116 + ... + 302626.

It is an arithmetic number, because the mean of its divisors is an integer number (5416656768).

Almost surely, 2^42419921581 is an apocalyptic number.

It is an amenable number.

42419921581 is a deficient number, since it is larger than the sum of its proper divisors (913332563).

42419921581 is a wasteful number, since it uses less digits than its factorization.

42419921581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224651.

The product of its digits is 207360, while the sum is 46.

The spelling of 42419921581 in words is "forty-two billion, four hundred nineteen million, nine hundred twenty-one thousand, five hundred eighty-one".