84371643520 has 128 divisors (see below), whose sum is σ = 208841817600. Its totient is φ = 32560496640.

The previous prime is 84371643469. The next prime is 84371643527. The reversal of 84371643520 is 2534617348.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (84371643527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6679771 + ... + 6692389.

It is an arithmetic number, because the mean of its divisors is an integer number (1631576700).

Almost surely, 2^84371643520 is an apocalyptic number.

84371643520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84371643520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104420908800).

84371643520 is an abundant number, since it is smaller than the sum of its proper divisors (124470174080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

84371643520 is a wasteful number, since it uses less digits than its factorization.

84371643520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13006 (or 12994 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 43.

The spelling of 84371643520 in words is "eighty-four billion, three hundred seventy-one million, six hundred forty-three thousand, five hundred twenty".