28125718018 has 8 divisors (see below), whose sum is σ = 42236142912. Its totient is φ = 14047003716.

The previous prime is 28125718009. The next prime is 28125718039. The reversal of 28125718018 is 81081752182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7925430 + ... + 7928977.

It is an arithmetic number, because the mean of its divisors is an integer number (5279517864).

Almost surely, 2^28125718018 is an apocalyptic number.

28125718018 is a deficient number, since it is larger than the sum of its proper divisors (14110424894).

28125718018 is a wasteful number, since it uses less digits than its factorization.

28125718018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15855296.

The product of its (nonzero) digits is 71680, while the sum is 43.

The spelling of 28125718018 in words is "twenty-eight billion, one hundred twenty-five million, seven hundred eighteen thousand, eighteen".