84642821328 has 40 divisors (see below), whose sum is σ = 235480671328. Its totient is φ = 26043944832.

The previous prime is 84642821287. The next prime is 84642821339. The reversal of 84642821328 is 82312824648.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67822150 + ... + 67823397.

Almost surely, 2^84642821328 is an apocalyptic number.

It is an amenable number.

84642821328 is an abundant number, since it is smaller than the sum of its proper divisors (150837850000).

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

84642821328 is a wasteful number, since it uses less digits than its factorization.

84642821328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135645571 (or 135645565 counting only the distinct ones).

The product of its digits is 1179648, while the sum is 48.

The spelling of 84642821328 in words is "eighty-four billion, six hundred forty-two million, eight hundred twenty-one thousand, three hundred twenty-eight".