84173912890 has 8 divisors (see below), whose sum is σ = 151513043220. Its totient is φ = 33669565152.

The previous prime is 84173912873. The next prime is 84173912929. The reversal of 84173912890 is 9821937148.

It can be written as a sum of positive squares in 2 ways, for example, as 84112180441 + 61732449 = 290021^2 + 7857^2 .

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

It is a super-2 number, since 2×84173912890² (a number of 23 digits) contains 22 as substring.

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, 4208695635 + ... + 4208695654.

Almost surely, 2^84173912890 is an apocalyptic number.

84173912890 is a deficient number, since it is larger than the sum of its proper divisors (67339130330).

84173912890 is a wasteful number, since it uses less digits than its factorization.

84173912890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8417391296.

The product of its (nonzero) digits is 870912, while the sum is 52.

The spelling of 84173912890 in words is "eighty-four billion, one hundred seventy-three million, nine hundred twelve thousand, eight hundred ninety".