84155733420 has 384 divisors, whose sum is σ = 278256384000. Its totient is φ = 18777292800.

The previous prime is 84155733377. The next prime is 84155733421. The reversal of 84155733420 is 2433755148.

It is not an unprimeable number, because it can be changed into a prime (84155733421) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 118696026 + ... + 118696734.

It is an arithmetic number, because the mean of its divisors is an integer number (724626000).

Almost surely, 2^84155733420 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 84155733420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139128192000).

84155733420 is an abundant number, since it is smaller than the sum of its proper divisors (194100650580).

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

84155733420 is a wasteful number, since it uses less digits than its factorization.

84155733420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969 (or 967 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 42.

The spelling of 84155733420 in words is "eighty-four billion, one hundred fifty-five million, seven hundred thirty-three thousand, four hundred twenty".