84000040000 has 70 divisors (see below), whose sum is σ = 208292898374. Its totient is φ = 33600000000.

The previous prime is 84000039997. The next prime is 84000040001. The reversal of 84000040000 is 4000048.

It can be written as a sum of positive squares in 5 ways, for example, as 7222280256 + 76777759744 = 84984^2 + 277088^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (84000040001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1010001 + ... + 1090000.

Almost surely, 2^84000040000 is an apocalyptic number.

84000040000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

84000040000 is an abundant number, since it is smaller than the sum of its proper divisors (124292858374).

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

84000040000 is an equidigital number, since it uses as much as digits as its factorization.

84000040000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100033 (or 2100008 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 84000040000 its reverse (4000048), we get a palindrome (84004040048).

The spelling of 84000040000 in words is "eighty-four billion, forty thousand".