84159973440 has 168 divisors, whose sum is σ = 302061359808. Its totient is φ = 21466874880.

The previous prime is 84159973427. The next prime is 84159973459. The reversal of 84159973440 is 4437995148.

84159973440 is a `hidden beast` number, since 8 + 4 + 1 + 599 + 7 + 3 + 4 + 40 = 666.

It is a super-2 number, since 2×84159973440² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 569026 + ... + 701505.

Almost surely, 2^84159973440 is an apocalyptic number.

84159973440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

84159973440 is an abundant number, since it is smaller than the sum of its proper divisors (217901386368).

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

84159973440 is a wasteful number, since it uses less digits than its factorization.

84159973440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270577 (or 1270564 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 84159973440 in words is "eighty-four billion, one hundred fifty-nine million, nine hundred seventy-three thousand, four hundred forty".