11143601509 has 8 divisors (see below), whose sum is σ = 11612012760. Its totient is φ = 10680800256.

The previous prime is 11143601419. The next prime is 11143601531. The reversal of 11143601509 is 90510634111.

It can be written as a sum of positive squares in 4 ways, for example, as 3601200100 + 7542401409 = 60010^2 + 86847^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11143601509 - 2¹⁹ = 11143077221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11143601809) 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, 1398444 + ... + 1406389.

It is an arithmetic number, because the mean of its divisors is an integer number (1451501595).

Almost surely, 2^11143601509 is an apocalyptic number.

It is an amenable number.

11143601509 is a deficient number, since it is larger than the sum of its proper divisors (468411251).

11143601509 is a wasteful number, since it uses less digits than its factorization.

11143601509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2804999.

The product of its (nonzero) digits is 3240, while the sum is 31.

The spelling of 11143601509 in words is "eleven billion, one hundred forty-three million, six hundred one thousand, five hundred nine".