28715111808523 has 8 divisors (see below), whose sum is σ = 32817725076992. Its totient is φ = 24612612149736.

The previous prime is 28715111808499. The next prime is 28715111808541. The reversal of 28715111808523 is 32580811151782.

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

It is a cyclic number.

It is not a de Polignac number, because 28715111808523 - 2⁵ = 28715111808491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28715111808563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27860115 + ... + 28872412.

It is an arithmetic number, because the mean of its divisors is an integer number (4102215634624).

Almost surely, 2^{28715111808523} is an apocalyptic number.

28715111808523 is a deficient number, since it is larger than the sum of its proper divisors (4102613268469).

28715111808523 is an equidigital number, since it uses as much as digits as its factorization.

28715111808523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56804841.

The product of its (nonzero) digits is 1075200, while the sum is 52.

The spelling of 28715111808523 in words is "twenty-eight trillion, seven hundred fifteen billion, one hundred eleven million, eight hundred eight thousand, five hundred twenty-three".