11550507550 has 48 divisors (see below), whose sum is σ = 22834431360. Its totient is φ = 4334502240.

The previous prime is 11550507541. The next prime is 11550507581. The reversal of 11550507550 is 5570505511.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38829 + ... + 156871.

It is an arithmetic number, because the mean of its divisors is an integer number (475717320).

Almost surely, 2^11550507550 is an apocalyptic number.

11550507550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11550507550 is a deficient number, since it is larger than the sum of its proper divisors (11283923810).

11550507550 is a wasteful number, since it uses less digits than its factorization.

11550507550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118177 (or 118172 counting only the distinct ones).

The product of its (nonzero) digits is 21875, while the sum is 34.

The spelling of 11550507550 in words is "eleven billion, five hundred fifty million, five hundred seven thousand, five hundred fifty".