84397065984 has 648 divisors, whose sum is σ = 312060717696. Its totient is φ = 21311078400.

The previous prime is 84397065983. The next prime is 84397066007. The reversal of 84397065984 is 48956079348.

84397065984 is a `hidden beast` number, since 8 + 4 + 39 + 7 + 0 + 6 + 598 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84397065983) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 298222707 + ... + 298222989.

Almost surely, 2^84397065984 is an apocalyptic number.

84397065984 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84397065984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156030358848).

84397065984 is an abundant number, since it is smaller than the sum of its proper divisors (227663651712).

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

84397065984 is a wasteful number, since it uses less digits than its factorization.

84397065984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405 (or 347 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 63.

The spelling of 84397065984 in words is "eighty-four billion, three hundred ninety-seven million, sixty-five thousand, nine hundred eighty-four".