11530388287 has 4 divisors (see below), whose sum is σ = 12578605416. Its totient is φ = 10482171160.

The previous prime is 11530388281. The next prime is 11530388291. The reversal of 11530388287 is 78288303511.

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-11530388287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11530388281) 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, 524108548 + ... + 524108569.

It is an arithmetic number, because the mean of its divisors is an integer number (3144651354).

Almost surely, 2^11530388287 is an apocalyptic number.

11530388287 is a deficient number, since it is larger than the sum of its proper divisors (1048217129).

11530388287 is a wasteful number, since it uses less digits than its factorization.

11530388287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048217128.

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 11530388287 in words is "eleven billion, five hundred thirty million, three hundred eighty-eight thousand, two hundred eighty-seven".