84129722889 has 8 divisors (see below), whose sum is σ = 112182766560. Its totient is φ = 56081580576.

The previous prime is 84129722881. The next prime is 84129722923. The reversal of 84129722889 is 98822792148.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 84129722889 - 2³ = 84129722881 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (84129722881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1185099 + ... + 1254080.

It is an arithmetic number, because the mean of its divisors is an integer number (14022845820).

Almost surely, 2^84129722889 is an apocalyptic number.

It is an amenable number.

84129722889 is a deficient number, since it is larger than the sum of its proper divisors (28053043671).

84129722889 is a wasteful number, since it uses less digits than its factorization.

84129722889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2450679.

The product of its digits is 9289728, while the sum is 60.

The spelling of 84129722889 in words is "eighty-four billion, one hundred twenty-nine million, seven hundred twenty-two thousand, eight hundred eighty-nine".