11989542394 has 16 divisors (see below), whose sum is σ = 18206455680. Its totient is φ = 5920767360.

The previous prime is 11989542379. The next prime is 11989542401. The reversal of 11989542394 is 49324598911.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 673642 + ... + 691210.

It is an arithmetic number, because the mean of its divisors is an integer number (1137903480).

Almost surely, 2^11989542394 is an apocalyptic number.

11989542394 is a deficient number, since it is larger than the sum of its proper divisors (6216913286).

11989542394 is a wasteful number, since it uses less digits than its factorization.

11989542394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21765.

The product of its digits is 2799360, while the sum is 55.

The spelling of 11989542394 in words is "eleven billion, nine hundred eighty-nine million, five hundred forty-two thousand, three hundred ninety-four".