84367365921 has 12 divisors (see below), whose sum is σ = 121888309140. Its totient is φ = 56233678560.

The previous prime is 84367365919. The next prime is 84367365947. The reversal of 84367365921 is 12956376348.

84367365921 is a `hidden beast` number, since 8 + 43 + 6 + 7 + 3 + 6 + 592 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 64475366400 + 19891999521 = 253920^2 + 141039^2 .

It is not a de Polignac number, because 84367365921 - 2¹ = 84367365919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84367365911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 888306 + ... + 978683.

It is an arithmetic number, because the mean of its divisors is an integer number (10157359095).

Almost surely, 2^84367365921 is an apocalyptic number.

It is an amenable number.

84367365921 is a deficient number, since it is larger than the sum of its proper divisors (37520943219).

84367365921 is a wasteful number, since it uses less digits than its factorization.

84367365921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1872016 (or 1872013 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The spelling of 84367365921 in words is "eighty-four billion, three hundred sixty-seven million, three hundred sixty-five thousand, nine hundred twenty-one".