12011546550 has 96 divisors (see below), whose sum is σ = 30632039424. Its totient is φ = 3112992000.

The previous prime is 12011546543. The next prime is 12011546551. The reversal of 12011546550 is 5564511021.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011546551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1663047 + ... + 1670253.

It is an arithmetic number, because the mean of its divisors is an integer number (319083744).

Almost surely, 2^12011546550 is an apocalyptic number.

12011546550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12011546550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15316019712).

12011546550 is an abundant number, since it is smaller than the sum of its proper divisors (18620492874).

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

12011546550 is a wasteful number, since it uses less digits than its factorization.

12011546550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7534 (or 7529 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

The spelling of 12011546550 in words is "twelve billion, eleven million, five hundred forty-six thousand, five hundred fifty".