11785384990 has 16 divisors (see below), whose sum is σ = 21504292848. Its totient is φ = 4649576256.

The previous prime is 11785384969. The next prime is 11785384993. The reversal of 11785384990 is 9948358711.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11785384993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8071452 + ... + 8072911.

It is an arithmetic number, because the mean of its divisors is an integer number (1344018303).

Almost surely, 2^11785384990 is an apocalyptic number.

11785384990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11785384990 is a deficient number, since it is larger than the sum of its proper divisors (9718907858).

11785384990 is a wasteful number, since it uses less digits than its factorization.

11785384990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16144443.

The product of its (nonzero) digits is 2177280, while the sum is 55.

The spelling of 11785384990 in words is "eleven billion, seven hundred eighty-five million, three hundred eighty-four thousand, nine hundred ninety".