84821894864 has 160 divisors (see below), whose sum is σ = 203107833600. Its totient is φ = 33502740480.

The previous prime is 84821894863. The next prime is 84821894869. The reversal of 84821894864 is 46849812848.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 84821894797 and 84821894806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84821894863) 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, 35683244 + ... + 35685620.

It is an arithmetic number, because the mean of its divisors is an integer number (1269423960).

Almost surely, 2^84821894864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84821894864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101553916800).

84821894864 is an abundant number, since it is smaller than the sum of its proper divisors (118285938736).

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

84821894864 is a wasteful number, since it uses less digits than its factorization.

84821894864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2861 (or 2855 counting only the distinct ones).

The product of its digits is 28311552, while the sum is 62.

The spelling of 84821894864 in words is "eighty-four billion, eight hundred twenty-one million, eight hundred ninety-four thousand, eight hundred sixty-four".