42982705781 has 8 divisors (see below), whose sum is σ = 43765808184. Its totient is φ = 42202134720.

The previous prime is 42982705763. The next prime is 42982705811. The reversal of 42982705781 is 18750728924.

It can be written as a sum of positive squares in 4 ways, for example, as 738480625 + 42244225156 = 27175^2 + 205534^2 .

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 42982705781 - 2³⁴ = 25802836597 is a prime.

It is a super-3 number, since 3×42982705781³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42982705081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 598550 + ... + 666503.

It is an arithmetic number, because the mean of its divisors is an integer number (5470726023).

Almost surely, 2^42982705781 is an apocalyptic number.

It is an amenable number.

42982705781 is a deficient number, since it is larger than the sum of its proper divisors (783102403).

42982705781 is a wasteful number, since it uses less digits than its factorization.

42982705781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265671.

The product of its (nonzero) digits is 2257920, while the sum is 53.

The spelling of 42982705781 in words is "forty-two billion, nine hundred eighty-two million, seven hundred five thousand, seven hundred eighty-one".