11989023393581 has 16 divisors (see below), whose sum is σ = 12997307119104. Its totient is φ = 10993121860224.

The previous prime is 11989023393569. The next prime is 11989023393631. The reversal of 11989023393581 is 18539332098911.

It is a cyclic number.

It is not a de Polignac number, because 11989023393581 - 2¹⁰ = 11989023392557 is a prime.

It is a super-2 number, since 2×11989023393581² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11989023393511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1371401 + ... + 5085153.

It is an arithmetic number, because the mean of its divisors is an integer number (812331694944).

Almost surely, 2^{11989023393581} is an apocalyptic number.

It is an amenable number.

11989023393581 is a deficient number, since it is larger than the sum of its proper divisors (1008283725523).

11989023393581 is a wasteful number, since it uses less digits than its factorization.

11989023393581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3715420.

The product of its (nonzero) digits is 12597120, while the sum is 62.

The spelling of 11989023393581 in words is "eleven trillion, nine hundred eighty-nine billion, twenty-three million, three hundred ninety-three thousand, five hundred eighty-one".