28751482091 has 4 divisors (see below), whose sum is σ = 28820101800. Its totient is φ = 28682862384.

The previous prime is 28751482079. The next prime is 28751482141. The reversal of 28751482091 is 19028415782.

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-28751482091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28751481091) 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, 34309226 + ... + 34310063.

It is an arithmetic number, because the mean of its divisors is an integer number (7205025450).

Almost surely, 2^28751482091 is an apocalyptic number.

28751482091 is a deficient number, since it is larger than the sum of its proper divisors (68619709).

28751482091 is an equidigital number, since it uses as much as digits as its factorization.

28751482091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68619708.

The product of its (nonzero) digits is 322560, while the sum is 47.

The spelling of 28751482091 in words is "twenty-eight billion, seven hundred fifty-one million, four hundred eighty-two thousand, ninety-one".