11511550512 has 120 divisors (see below), whose sum is σ = 40165881600. Its totient is φ = 2990010240.

The previous prime is 11511550507. The next prime is 11511550513. The reversal of 11511550512 is 21505511511.

It is a happy number.

11511550512 is a `hidden beast` number, since 1 + 151 + 1 + 5 + 505 + 1 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (11511550513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 508012 + ... + 530187.

It is an arithmetic number, because the mean of its divisors is an integer number (334715680).

Almost surely, 2^11511550512 is an apocalyptic number.

11511550512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11511550512 is an abundant number, since it is smaller than the sum of its proper divisors (28654331088).

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

11511550512 is a wasteful number, since it uses less digits than its factorization.

11511550512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038231 (or 1038222 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 27.

The spelling of 11511550512 in words is "eleven billion, five hundred eleven million, five hundred fifty thousand, five hundred twelve".