42171782612681 has 8 divisors (see below), whose sum is σ = 42182526095424. Its totient is φ = 42161040478480.

The previous prime is 42171782612657. The next prime is 42171782612719. The reversal of 42171782612681 is 18621628717124.

42171782612681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42171782612681 - 2²² = 42171778418377 is a prime.

It is a super-2 number, since 2×42171782612681² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42171782012681) by changing a digit.

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, 63757646 + ... + 64415688.

It is an arithmetic number, because the mean of its divisors is an integer number (5272815761928).

Almost surely, 2^{42171782612681} is an apocalyptic number.

It is an amenable number.

42171782612681 is a deficient number, since it is larger than the sum of its proper divisors (10743482743).

42171782612681 is an equidigital number, since it uses as much as digits as its factorization.

42171782612681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674271.

The product of its digits is 3612672, while the sum is 56.

The spelling of 42171782612681 in words is "forty-two trillion, one hundred seventy-one billion, seven hundred eighty-two million, six hundred twelve thousand, six hundred eighty-one".