84720717345 has 32 divisors (see below), whose sum is σ = 147889889280. Its totient is φ = 41072898240.

The previous prime is 84720717307. The next prime is 84720717349. The reversal of 84720717345 is 54371702748.

It is not a de Polignac number, because 84720717345 - 2¹⁰ = 84720716321 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 84720717294 and 84720717303.

It is not an unprimeable number, because it can be changed into a prime (84720717349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2698146 + ... + 2729364.

It is an arithmetic number, because the mean of its divisors is an integer number (4621559040).

Almost surely, 2^84720717345 is an apocalyptic number.

It is an amenable number.

84720717345 is a deficient number, since it is larger than the sum of its proper divisors (63169171935).

84720717345 is a wasteful number, since it uses less digits than its factorization.

84720717345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47685.

The product of its (nonzero) digits is 1317120, while the sum is 48.

The spelling of 84720717345 in words is "eighty-four billion, seven hundred twenty million, seven hundred seventeen thousand, three hundred forty-five".