11531120736406 has 4 divisors (see below), whose sum is σ = 17296681104612. Its totient is φ = 5765560368202.

The previous prime is 11531120736337. The next prime is 11531120736469. The reversal of 11531120736406 is 60463702113511.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2882780184100 + ... + 2882780184103.

It is an arithmetic number, because the mean of its divisors is an integer number (4324170276153).

Almost surely, 2^{11531120736406} is an apocalyptic number.

11531120736406 is a deficient number, since it is larger than the sum of its proper divisors (5765560368206).

11531120736406 is an equidigital number, since it uses as much as digits as its factorization.

11531120736406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5765560368205.

The product of its (nonzero) digits is 90720, while the sum is 40.

Adding to 11531120736406 its reverse (60463702113511), we get a palindrome (71994822849917).

The spelling of 11531120736406 in words is "eleven trillion, five hundred thirty-one billion, one hundred twenty million, seven hundred thirty-six thousand, four hundred six".