84365273189921 has 8 divisors (see below), whose sum is σ = 85974581160360. Its totient is φ = 82756613751552.

The previous prime is 84365273189903. The next prime is 84365273189929. The reversal of 84365273189921 is 12998137256348.

It can be written as a sum of positive squares in 4 ways, for example, as 63124788802321 + 21240484387600 = 7945111^2 + 4608740^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84365273189921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84365273189929) 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, 161870360 + ... + 162390713.

It is an arithmetic number, because the mean of its divisors is an integer number (10746822645045).

Almost surely, 2^{84365273189921} is an apocalyptic number.

It is an amenable number.

84365273189921 is a deficient number, since it is larger than the sum of its proper divisors (1609307970439).

84365273189921 is a wasteful number, since it uses less digits than its factorization.

84365273189921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324266035.

The product of its digits is 156764160, while the sum is 68.

The spelling of 84365273189921 in words is "eighty-four trillion, three hundred sixty-five billion, two hundred seventy-three million, one hundred eighty-nine thousand, nine hundred twenty-one".