11663394990 has 128 divisors (see below), whose sum is σ = 31689004032. Its totient is φ = 2725831680.

The previous prime is 11663394971. The next prime is 11663394991. The reversal of 11663394990 is 9949336611.

11663394990 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 (11663394991) 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 63 ways as a sum of consecutive naturals, for example, 1224145 + ... + 1233635.

It is an arithmetic number, because the mean of its divisors is an integer number (247570344).

Almost surely, 2^11663394990 is an apocalyptic number.

11663394990 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 11663394990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15844502016).

11663394990 is an abundant number, since it is smaller than the sum of its proper divisors (20025609042).

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

11663394990 is a wasteful number, since it uses less digits than its factorization.

11663394990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9674.

The product of its (nonzero) digits is 944784, while the sum is 51.

The spelling of 11663394990 in words is "eleven billion, six hundred sixty-three million, three hundred ninety-four thousand, nine hundred ninety".