11530532550 has 48 divisors (see below), whose sum is σ = 28661022720. Its totient is φ = 3067787040.

The previous prime is 11530532549. The next prime is 11530532597. The reversal of 11530532550 is 5523503511.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 21702 + ... + 153401.

It is an arithmetic number, because the mean of its divisors is an integer number (597104640).

Almost surely, 2^11530532550 is an apocalyptic number.

11530532550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11530532550 is an abundant number, since it is smaller than the sum of its proper divisors (17130490170).

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

11530532550 is a wasteful number, since it uses less digits than its factorization.

11530532550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175557 (or 175552 counting only the distinct ones).

The product of its (nonzero) digits is 11250, while the sum is 30.

The spelling of 11530532550 in words is "eleven billion, five hundred thirty million, five hundred thirty-two thousand, five hundred fifty".