11532840509 has 2 divisors, whose sum is σ = 11532840510. Its totient is φ = 11532840508.

The previous prime is 11532840479. The next prime is 11532840547. The reversal of 11532840509 is 90504823511.

It is a happy number.

It is an a-pointer prime, because the next prime (11532840547) can be obtained adding 11532840509 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11530034884 + 2805625 = 107378^2 + 1675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11532840509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11532840559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5766420254 + 5766420255.

It is an arithmetic number, because the mean of its divisors is an integer number (5766420255).

Almost surely, 2^11532840509 is an apocalyptic number.

It is an amenable number.

11532840509 is a deficient number, since it is larger than the sum of its proper divisors (1).

11532840509 is an equidigital number, since it uses as much as digits as its factorization.

11532840509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 38.

The spelling of 11532840509 in words is "eleven billion, five hundred thirty-two million, eight hundred forty thousand, five hundred nine".