28646664524658 has 96 divisors (see below), whose sum is σ = 64910312812800. Its totient is φ = 9113442357888.

The previous prime is 28646664524651. The next prime is 28646664524683. The reversal of 28646664524658 is 85642546664682.

It is not an unprimeable number, because it can be changed into a prime (28646664524651) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 342134523 + ... + 342218241.

It is an arithmetic number, because the mean of its divisors is an integer number (676149091800).

Almost surely, 2^{28646664524658} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28646664524658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32455156406400).

28646664524658 is an abundant number, since it is smaller than the sum of its proper divisors (36263648288142).

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

28646664524658 is a wasteful number, since it uses less digits than its factorization.

28646664524658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85576 (or 85573 counting only the distinct ones).

The product of its digits is 3185049600, while the sum is 72.

The spelling of 28646664524658 in words is "twenty-eight trillion, six hundred forty-six billion, six hundred sixty-four million, five hundred twenty-four thousand, six hundred fifty-eight".