11531334621445 has 16 divisors (see below), whose sum is σ = 14028759437760. Its totient is φ = 9097657962624.

The previous prime is 11531334621409. The next prime is 11531334621461. The reversal of 11531334621445 is 54412643313511.

It is a cyclic number.

It is not a de Polignac number, because 11531334621445 - 2²⁹ = 11530797750533 is a prime.

It is a super-2 number, since 2×11531334621445² (a number of 27 digits) contains 22 as substring.

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, 1405002 + ... + 5003668.

It is an arithmetic number, because the mean of its divisors is an integer number (876797464860).

Almost surely, 2^{11531334621445} is an apocalyptic number.

It is an amenable number.

11531334621445 is a deficient number, since it is larger than the sum of its proper divisors (2497424816315).

11531334621445 is an equidigital number, since it uses as much as digits as its factorization.

11531334621445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3607524.

The product of its digits is 518400, while the sum is 43.

Adding to 11531334621445 its reverse (54412643313511), we get a palindrome (65943977934956).

The spelling of 11531334621445 in words is "eleven trillion, five hundred thirty-one billion, three hundred thirty-four million, six hundred twenty-one thousand, four hundred forty-five".