84121943800 has 96 divisors (see below), whose sum is σ = 198768885120. Its totient is φ = 33102115200.

The previous prime is 84121943729. The next prime is 84121943809. The reversal of 84121943800 is 834912148.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84121943809) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11078005 + ... + 11085595.

It is an arithmetic number, because the mean of its divisors is an integer number (2070509220).

Almost surely, 2^84121943800 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 84121943800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99384442560).

84121943800 is an abundant number, since it is smaller than the sum of its proper divisors (114646941320).

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

84121943800 is a wasteful number, since it uses less digits than its factorization.

84121943800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8501 (or 8492 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The spelling of 84121943800 in words is "eighty-four billion, one hundred twenty-one million, nine hundred forty-three thousand, eight hundred".