84129722890 has 8 divisors (see below), whose sum is σ = 151433501220. Its totient is φ = 33651889152.

The previous prime is 84129722881. The next prime is 84129722923. The reversal of 84129722890 is 9822792148.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 82692478969 + 1437243921 = 287563^2 + 37911^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4206486135 + ... + 4206486154.

Almost surely, 2^84129722890 is an apocalyptic number.

84129722890 is a deficient number, since it is larger than the sum of its proper divisors (67303778330).

84129722890 is a wasteful number, since it uses less digits than its factorization.

84129722890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8412972296.

The product of its (nonzero) digits is 1161216, while the sum is 52.

The spelling of 84129722890 in words is "eighty-four billion, one hundred twenty-nine million, seven hundred twenty-two thousand, eight hundred ninety".