84905368917 has 32 divisors (see below), whose sum is σ = 121837547520. Its totient is φ = 52465723200.

The previous prime is 84905368903. The next prime is 84905368927. The reversal of 84905368917 is 71986350948.

It is not a de Polignac number, because 84905368917 - 2⁶ = 84905368853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84905368927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 197934 + ... + 457152.

It is an arithmetic number, because the mean of its divisors is an integer number (3807423360).

Almost surely, 2^84905368917 is an apocalyptic number.

It is an amenable number.

84905368917 is a deficient number, since it is larger than the sum of its proper divisors (36932178603).

84905368917 is a wasteful number, since it uses less digits than its factorization.

84905368917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259393.

The product of its (nonzero) digits is 13063680, while the sum is 60.

The spelling of 84905368917 in words is "eighty-four billion, nine hundred five million, three hundred sixty-eight thousand, nine hundred seventeen".