28315852511 has 4 divisors (see below), whose sum is σ = 29981490912. Its totient is φ = 26650214112.

The previous prime is 28315852493. The next prime is 28315852549. The reversal of 28315852511 is 11525851382.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28315852511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28315852711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 832819175 + ... + 832819208.

It is an arithmetic number, because the mean of its divisors is an integer number (7495372728).

Almost surely, 2^28315852511 is an apocalyptic number.

28315852511 is a deficient number, since it is larger than the sum of its proper divisors (1665638401).

28315852511 is a wasteful number, since it uses less digits than its factorization.

28315852511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665638400.

The product of its digits is 96000, while the sum is 41.

The spelling of 28315852511 in words is "twenty-eight billion, three hundred fifteen million, eight hundred fifty-two thousand, five hundred eleven".