84161405999 has 16 divisors (see below), whose sum is σ = 93093840000. Its totient is φ = 75449932320.

The previous prime is 84161405921. The next prime is 84161406001. The reversal of 84161405999 is 99950416148.

It is a cyclic number.

It is not a de Polignac number, because 84161405999 - 2²⁰ = 84160357423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84161405099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43112 + ... + 412530.

It is an arithmetic number, because the mean of its divisors is an integer number (5818365000).

Almost surely, 2^84161405999 is an apocalyptic number.

84161405999 is a deficient number, since it is larger than the sum of its proper divisors (8932434001).

84161405999 is a wasteful number, since it uses less digits than its factorization.

84161405999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369718.

The product of its (nonzero) digits is 2799360, while the sum is 56.

The spelling of 84161405999 in words is "eighty-four billion, one hundred sixty-one million, four hundred five thousand, nine hundred ninety-nine".