28775425911 has 4 divisors (see below), whose sum is σ = 38367234552. Its totient is φ = 19183617272.

The previous prime is 28775425891. The next prime is 28775425933. The reversal of 28775425911 is 11952457782.

It is a happy number.

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 28775425911 - 2¹¹ = 28775423863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28775425961) 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, 4795904316 + ... + 4795904321.

It is an arithmetic number, because the mean of its divisors is an integer number (9591808638).

Almost surely, 2^28775425911 is an apocalyptic number.

28775425911 is a deficient number, since it is larger than the sum of its proper divisors (9591808641).

28775425911 is an equidigital number, since it uses as much as digits as its factorization.

28775425911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9591808640.

The product of its digits is 1411200, while the sum is 51.

The spelling of 28775425911 in words is "twenty-eight billion, seven hundred seventy-five million, four hundred twenty-five thousand, nine hundred eleven".