28565483091 has 4 divisors (see below), whose sum is σ = 38087310792. Its totient is φ = 19043655392.

The previous prime is 28565483077. The next prime is 28565483117. The reversal of 28565483091 is 19038456582.

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 28565483091 - 2⁹ = 28565482579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28565483021) 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, 4760913846 + ... + 4760913851.

It is an arithmetic number, because the mean of its divisors is an integer number (9521827698).

Almost surely, 2^28565483091 is an apocalyptic number.

28565483091 is a deficient number, since it is larger than the sum of its proper divisors (9521827701).

28565483091 is an equidigital number, since it uses as much as digits as its factorization.

28565483091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9521827700.

The product of its (nonzero) digits is 2073600, while the sum is 51.

The spelling of 28565483091 in words is "twenty-eight billion, five hundred sixty-five million, four hundred eighty-three thousand, ninety-one".