28052573690658 has 256 divisors, whose sum is σ = 64062495129600. Its totient is φ = 8115956110080.

The previous prime is 28052573690623. The next prime is 28052573690677. The reversal of 28052573690658 is 85609637525082.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 11511108216 + ... + 11511110652.

It is an arithmetic number, because the mean of its divisors is an integer number (250244121600).

Almost surely, 2^{28052573690658} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28052573690658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32031247564800).

28052573690658 is an abundant number, since it is smaller than the sum of its proper divisors (36009921438942).

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

28052573690658 is a wasteful number, since it uses less digits than its factorization.

28052573690658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3125.

The product of its (nonzero) digits is 217728000, while the sum is 66.

The spelling of 28052573690658 in words is "twenty-eight trillion, fifty-two billion, five hundred seventy-three million, six hundred ninety thousand, six hundred fifty-eight".