83999069856 has 144 divisors (see below), whose sum is σ = 268432085376. Its totient is φ = 24722108928.

The previous prime is 83999069849. The next prime is 83999069857. The reversal of 83999069856 is 65896099938.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (83999069857) 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 23 ways as a sum of consecutive naturals, for example, 401620 + ... + 573843.

It is an arithmetic number, because the mean of its divisors is an integer number (1864111704).

Almost surely, 2^83999069856 is an apocalyptic number.

It is an amenable number.

83999069856 is an abundant number, since it is smaller than the sum of its proper divisors (184433015520).

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

83999069856 is a wasteful number, since it uses less digits than its factorization.

83999069856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975515 (or 975504 counting only the distinct ones).

The product of its (nonzero) digits is 226748160, while the sum is 72.

The spelling of 83999069856 in words is "eighty-three billion, nine hundred ninety-nine million, sixty-nine thousand, eight hundred fifty-six".