84514643920 has 80 divisors (see below), whose sum is σ = 224797397760. Its totient is φ = 28946783232.

The previous prime is 84514643893. The next prime is 84514643959. The reversal of 84514643920 is 2934641548.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 473716 + ... + 627244.

It is an arithmetic number, because the mean of its divisors is an integer number (2809967472).

Almost surely, 2^84514643920 is an apocalyptic number.

84514643920 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 84514643920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112398698880).

84514643920 is an abundant number, since it is smaller than the sum of its proper divisors (140282753840).

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

84514643920 is a wasteful number, since it uses less digits than its factorization.

84514643920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154532 (or 154526 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 84514643920 in words is "eighty-four billion, five hundred fourteen million, six hundred forty-three thousand, nine hundred twenty".