11620655550 has 384 divisors, whose sum is σ = 39190348800. Its totient is φ = 2472768000.

The previous prime is 11620655537. The next prime is 11620655551. The reversal of 11620655550 is 5555602611.

11620655550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11620655551) by changing a digit.

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 191 ways as a sum of consecutive naturals, for example, 10952020 + ... + 10953080.

It is an arithmetic number, because the mean of its divisors is an integer number (102058200).

Almost surely, 2^11620655550 is an apocalyptic number.

11620655550 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 11620655550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19595174400).

11620655550 is an abundant number, since it is smaller than the sum of its proper divisors (27569693250).

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

11620655550 is a wasteful number, since it uses less digits than its factorization.

11620655550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169 (or 1158 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The spelling of 11620655550 in words is "eleven billion, six hundred twenty million, six hundred fifty-five thousand, five hundred fifty".