84091899942 has 12 divisors (see below), whose sum is σ = 182199116580. Its totient is φ = 28030633308.

The previous prime is 84091899919. The next prime is 84091899971. The reversal of 84091899942 is 24999819048.

84091899942 is a `hidden beast` number, since 8 + 409 + 189 + 9 + 9 + 42 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 84091899942.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 2335886092 + ... + 2335886127.

It is an arithmetic number, because the mean of its divisors is an integer number (15183259715).

Almost surely, 2^84091899942 is an apocalyptic number.

84091899942 is an abundant number, since it is smaller than the sum of its proper divisors (98107216638).

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

84091899942 is a wasteful number, since it uses less digits than its factorization.

84091899942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4671772227 (or 4671772224 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 63.

The spelling of 84091899942 in words is "eighty-four billion, ninety-one million, eight hundred ninety-nine thousand, nine hundred forty-two".