11530208500 has 24 divisors (see below), whose sum is σ = 25181976456. Its totient is φ = 4612083200.

The previous prime is 11530208491. The next prime is 11530208507. The reversal of 11530208500 is 580203511.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 286151056 + 11244057444 = 16916^2 + 106038^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11530208507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11529709 + ... + 11530708.

It is an arithmetic number, because the mean of its divisors is an integer number (1049249019).

Almost surely, 2^11530208500 is an apocalyptic number.

11530208500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11530208500 is an abundant number, since it is smaller than the sum of its proper divisors (13651767956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11530208500 is a wasteful number, since it uses less digits than its factorization.

11530208500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23060436 (or 23060424 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The spelling of 11530208500 in words is "eleven billion, five hundred thirty million, two hundred eight thousand, five hundred".