84718805789 has 4 divisors (see below), whose sum is σ = 84719744256. Its totient is φ = 84717867324.

The previous prime is 84718805753. The next prime is 84718805791. The reversal of 84718805789 is 98750881748.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 84718805789 - 2¹² = 84718801693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84718805189) 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 3 ways as a sum of consecutive naturals, for example, 317459 + ... + 519824.

It is an arithmetic number, because the mean of its divisors is an integer number (21179936064).

Almost surely, 2^84718805789 is an apocalyptic number.

It is an amenable number.

84718805789 is a deficient number, since it is larger than the sum of its proper divisors (938467).

84718805789 is a wasteful number, since it uses less digits than its factorization.

84718805789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938466.

The product of its (nonzero) digits is 36126720, while the sum is 65.

The spelling of 84718805789 in words is "eighty-four billion, seven hundred eighteen million, eight hundred five thousand, seven hundred eighty-nine".