84821894798 has 4 divisors (see below), whose sum is σ = 127232842200. Its totient is φ = 42410947398.

The previous prime is 84821894771. The next prime is 84821894821. The reversal of 84821894798 is 89749812848.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21205473698 + ... + 21205473701.

It is an arithmetic number, because the mean of its divisors is an integer number (31808210550).

Almost surely, 2^84821894798 is an apocalyptic number.

84821894798 is a deficient number, since it is larger than the sum of its proper divisors (42410947402).

84821894798 is a wasteful number, since it uses less digits than its factorization.

84821894798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42410947401.

The product of its digits is 74317824, while the sum is 68.

The spelling of 84821894798 in words is "eighty-four billion, eight hundred twenty-one million, eight hundred ninety-four thousand, seven hundred ninety-eight".