84127820638681 has 8 divisors (see below), whose sum is σ = 84259764351360. Its totient is φ = 83995978230288.

The previous prime is 84127820638633. The next prime is 84127820638769. The reversal of 84127820638681 is 18683602872148.

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 84127820638681 - 2⁴³ = 75331727616473 is a prime.

It is a super-2 number, since 2×84127820638681² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84127820638601) 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, 23663791 + ... + 26985748.

It is an arithmetic number, because the mean of its divisors is an integer number (10532470543920).

Almost surely, 2^{84127820638681} is an apocalyptic number.

It is an amenable number.

84127820638681 is a deficient number, since it is larger than the sum of its proper divisors (131943712679).

84127820638681 is a wasteful number, since it uses less digits than its factorization.

84127820638681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50652143.

The product of its (nonzero) digits is 49545216, while the sum is 64.

The spelling of 84127820638681 in words is "eighty-four trillion, one hundred twenty-seven billion, eight hundred twenty million, six hundred thirty-eight thousand, six hundred eighty-one".