11389787994 has 64 divisors (see below), whose sum is σ = 26113449600. Its totient is φ = 3282757632.

The previous prime is 11389787897. The next prime is 11389788001. The reversal of 11389787994 is 49978798311.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88722 + ... + 175074.

It is an arithmetic number, because the mean of its divisors is an integer number (408022650).

Almost surely, 2^11389787994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11389787994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13056724800).

11389787994 is an abundant number, since it is smaller than the sum of its proper divisors (14723661606).

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

11389787994 is a wasteful number, since it uses less digits than its factorization.

11389787994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86479.

The product of its digits is 27433728, while the sum is 66.

The spelling of 11389787994 in words is "eleven billion, three hundred eighty-nine million, seven hundred eighty-seven thousand, nine hundred ninety-four".