11531120736445 has 16 divisors (see below), whose sum is σ = 13852703980800. Its totient is φ = 9214658936704.

The previous prime is 11531120736337. The next prime is 11531120736469. The reversal of 11531120736445 is 54463702113511.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11531120736445 - 2¹⁵ = 11531120703677 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55923177 + ... + 56128993.

It is an arithmetic number, because the mean of its divisors is an integer number (865793998800).

Almost surely, 2^{11531120736445} is an apocalyptic number.

It is an amenable number.

11531120736445 is a deficient number, since it is larger than the sum of its proper divisors (2321583244355).

11531120736445 is a wasteful number, since it uses less digits than its factorization.

11531120736445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218204.

The product of its (nonzero) digits is 302400, while the sum is 43.

Adding to 11531120736445 its reverse (54463702113511), we get a palindrome (65994822849956).

The spelling of 11531120736445 in words is "eleven trillion, five hundred thirty-one billion, one hundred twenty million, seven hundred thirty-six thousand, four hundred forty-five".