11503121532 has 24 divisors (see below), whose sum is σ = 30674990976. Its totient is φ = 3286606128.

The previous prime is 11503121521. The next prime is 11503121599. The reversal of 11503121532 is 23512130511.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 68470878 + ... + 68471045.

It is an arithmetic number, because the mean of its divisors is an integer number (1278124624).

Almost surely, 2^11503121532 is an apocalyptic number.

11503121532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11503121532 is an abundant number, since it is smaller than the sum of its proper divisors (19171869444).

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

11503121532 is a wasteful number, since it uses less digits than its factorization.

11503121532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136941937 (or 136941935 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The spelling of 11503121532 in words is "eleven billion, five hundred three million, one hundred twenty-one thousand, five hundred thirty-two".