28581117063 has 16 divisors (see below), whose sum is σ = 39071091840. Its totient is φ = 18574353504.

The previous prime is 28581117017. The next prime is 28581117073. The reversal of 28581117063 is 36071118582.

It is not a de Polignac number, because 28581117063 - 2⁶ = 28581116999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28581117013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151981 + ... + 283302.

It is an arithmetic number, because the mean of its divisors is an integer number (2441943240).

Almost surely, 2^28581117063 is an apocalyptic number.

28581117063 is a deficient number, since it is larger than the sum of its proper divisors (10489974777).

28581117063 is a wasteful number, since it uses less digits than its factorization.

28581117063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435838.

The product of its (nonzero) digits is 80640, while the sum is 42.

The spelling of 28581117063 in words is "twenty-eight billion, five hundred eighty-one million, one hundred seventeen thousand, sixty-three".