84513378388728 has 32 divisors (see below), whose sum is σ = 211287234609360. Its totient is φ = 28170620977920.

The previous prime is 84513378388723. The next prime is 84513378388741. The reversal of 84513378388728 is 82788387331548.

It is a super-2 number, since 2×84513378388728² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 84513378388728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84513378388721) 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, 30204463 + ... + 32883678.

Almost surely, 2^{84513378388728} is an apocalyptic number.

It is an amenable number.

84513378388728 is an abundant number, since it is smaller than the sum of its proper divisors (126773856220632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

84513378388728 is a wasteful number, since it uses less digits than its factorization.

84513378388728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63143967 (or 63143963 counting only the distinct ones).

The product of its digits is 1734082560, while the sum is 75.

The spelling of 84513378388728 in words is "eighty-four trillion, five hundred thirteen billion, three hundred seventy-eight million, three hundred eighty-eight thousand, seven hundred twenty-eight".