11528028641 has 4 divisors (see below), whose sum is σ = 11925546900. Its totient is φ = 11130510384.

The previous prime is 11528028637. The next prime is 11528028647. The reversal of 11528028641 is 14682082511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14682082511 = 307 ⋅47824373.

It can be written as a sum of positive squares in 2 ways, for example, as 2518032400 + 9009996241 = 50180^2 + 94921^2 .

It is a cyclic number.

It is not a de Polignac number, because 11528028641 - 2² = 11528028637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11528028595 and 11528028604.

It is not an unprimeable number, because it can be changed into a prime (11528028647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198759086 + ... + 198759143.

It is an arithmetic number, because the mean of its divisors is an integer number (2981386725).

Almost surely, 2^11528028641 is an apocalyptic number.

It is an amenable number.

11528028641 is a deficient number, since it is larger than the sum of its proper divisors (397518259).

11528028641 is an equidigital number, since it uses as much as digits as its factorization.

11528028641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397518258.

The product of its (nonzero) digits is 30720, while the sum is 38.

The spelling of 11528028641 in words is "eleven billion, five hundred twenty-eight million, twenty-eight thousand, six hundred forty-one".