11550320520 has 32 divisors (see below), whose sum is σ = 34650961920. Its totient is φ = 3080085440.

The previous prime is 11550320519. The next prime is 11550320567. The reversal of 11550320520 is 2502305511.

It is a happy number.

11550320520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11550320520² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48126216 + ... + 48126455.

It is an arithmetic number, because the mean of its divisors is an integer number (1082842560).

Almost surely, 2^11550320520 is an apocalyptic number.

11550320520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11550320520 is an abundant number, since it is smaller than the sum of its proper divisors (23100641400).

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

11550320520 is a wasteful number, since it uses less digits than its factorization.

11550320520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96252685 (or 96252681 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The spelling of 11550320520 in words is "eleven billion, five hundred fifty million, three hundred twenty thousand, five hundred twenty".