28767116571 has 4 divisors (see below), whose sum is σ = 38356155432. Its totient is φ = 19178077712.

The previous prime is 28767116563. The next prime is 28767116591. The reversal of 28767116571 is 17561176782.

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

It is a cyclic number.

It is not a de Polignac number, because 28767116571 - 2³ = 28767116563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28767116501) 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, 4794519426 + ... + 4794519431.

It is an arithmetic number, because the mean of its divisors is an integer number (9589038858).

Almost surely, 2^28767116571 is an apocalyptic number.

28767116571 is a deficient number, since it is larger than the sum of its proper divisors (9589038861).

28767116571 is an equidigital number, since it uses as much as digits as its factorization.

28767116571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9589038860.

The product of its digits is 987840, while the sum is 51.

The spelling of 28767116571 in words is "twenty-eight billion, seven hundred sixty-seven million, one hundred sixteen thousand, five hundred seventy-one".