11528739515 has 4 divisors (see below), whose sum is σ = 13834487424. Its totient is φ = 9222991608.

The previous prime is 11528739491. The next prime is 11528739539. The reversal of 11528739515 is 51593782511.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (11528739491) and next prime (11528739539).

It is a cyclic number.

It is not a de Polignac number, because 11528739515 - 2¹⁸ = 11528477371 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11528739515.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1152873947 + ... + 1152873956.

It is an arithmetic number, because the mean of its divisors is an integer number (3458621856).

Almost surely, 2^11528739515 is an apocalyptic number.

11528739515 is a deficient number, since it is larger than the sum of its proper divisors (2305747909).

11528739515 is an equidigital number, since it uses as much as digits as its factorization.

11528739515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2305747908.

The product of its digits is 378000, while the sum is 47.

The spelling of 11528739515 in words is "eleven billion, five hundred twenty-eight million, seven hundred thirty-nine thousand, five hundred fifteen".