28553331011 has 4 divisors (see below), whose sum is σ = 28580042400. Its totient is φ = 28526619624.

The previous prime is 28553330999. The next prime is 28553331031. The reversal of 28553331011 is 11013335582.

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-28553331011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28553331031) 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, 13354091 + ... + 13356228.

It is an arithmetic number, because the mean of its divisors is an integer number (7145010600).

Almost surely, 2^28553331011 is an apocalyptic number.

28553331011 is a deficient number, since it is larger than the sum of its proper divisors (26711389).

28553331011 is a wasteful number, since it uses less digits than its factorization.

28553331011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26711388.

The product of its (nonzero) digits is 10800, while the sum is 32.

Adding to 28553331011 its reverse (11013335582), we get a palindrome (39566666593).

The spelling of 28553331011 in words is "twenty-eight billion, five hundred fifty-three million, three hundred thirty-one thousand, eleven".