84438472869 has 32 divisors (see below), whose sum is σ = 131898240000. Its totient is φ = 53240337072.

The previous prime is 84438472837. The next prime is 84438472903. The reversal of 84438472869 is 96827483448.

84438472869 is a `hidden beast` number, since 84 + 4 + 3 + 8 + 472 + 86 + 9 = 666.

It is not a de Polignac number, because 84438472869 - 2⁵ = 84438472837 is a prime.

It is a super-2 number, since 2×84438472869² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84438472829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 169894 + ... + 444680.

It is an arithmetic number, because the mean of its divisors is an integer number (4121820000).

Almost surely, 2^84438472869 is an apocalyptic number.

It is an amenable number.

84438472869 is a deficient number, since it is larger than the sum of its proper divisors (47459767131).

84438472869 is a wasteful number, since it uses less digits than its factorization.

84438472869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275414 (or 275408 counting only the distinct ones).

The product of its digits is 74317824, while the sum is 63.

The spelling of 84438472869 in words is "eighty-four billion, four hundred thirty-eight million, four hundred seventy-two thousand, eight hundred sixty-nine".