28545072578 has 32 divisors (see below), whose sum is σ = 47116988928. Its totient is φ = 12862281600.

The previous prime is 28545072533. The next prime is 28545072643. The reversal of 28545072578 is 87527054582.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2275343 + ... + 2287853.

It is an arithmetic number, because the mean of its divisors is an integer number (1472405904).

Almost surely, 2^28545072578 is an apocalyptic number.

28545072578 is a deficient number, since it is larger than the sum of its proper divisors (18571916350).

28545072578 is a wasteful number, since it uses less digits than its factorization.

28545072578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13418.

The product of its (nonzero) digits is 6272000, while the sum is 53.

The spelling of 28545072578 in words is "twenty-eight billion, five hundred forty-five million, seventy-two thousand, five hundred seventy-eight".