42163370781 has 8 divisors (see below), whose sum is σ = 64248945984. Its totient is φ = 24093354720.

The previous prime is 42163370779. The next prime is 42163370783. The reversal of 42163370781 is 18707336124.

It is an interprime number because it is at equal distance from previous prime (42163370779) and next prime (42163370783).

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

It is not a de Polignac number, because 42163370781 - 2¹ = 42163370779 is a prime.

It is a super-2 number, since 2×42163370781² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42163370783) by changing a digit.

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, 1003889760 + ... + 1003889801.

It is an arithmetic number, because the mean of its divisors is an integer number (8031118248).

Almost surely, 2^42163370781 is an apocalyptic number.

It is an amenable number.

42163370781 is a deficient number, since it is larger than the sum of its proper divisors (22085575203).

42163370781 is a wasteful number, since it uses less digits than its factorization.

42163370781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2007779571.

The product of its (nonzero) digits is 169344, while the sum is 42.

The spelling of 42163370781 in words is "forty-two billion, one hundred sixty-three million, three hundred seventy thousand, seven hundred eighty-one".