1155651223444 has 24 divisors (see below), whose sum is σ = 2210429668608. Its totient is φ = 526292776320.

The previous prime is 1155651223411. The next prime is 1155651223459. The reversal of 1155651223444 is 4443221565511.

It is a super-2 number, since 2×1155651223444² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1155651223444.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274108714 + ... + 274112929.

It is an arithmetic number, because the mean of its divisors is an integer number (92101236192).

Almost surely, 2^{1155651223444} is an apocalyptic number.

It is an amenable number.

1155651223444 is a deficient number, since it is larger than the sum of its proper divisors (1054778445164).

1155651223444 is a wasteful number, since it uses less digits than its factorization.

1155651223444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548221695 (or 548221693 counting only the distinct ones).

The product of its digits is 576000, while the sum is 43.

Adding to 1155651223444 its reverse (4443221565511), we get a palindrome (5598872788955).

The spelling of 1155651223444 in words is "one trillion, one hundred fifty-five billion, six hundred fifty-one million, two hundred twenty-three thousand, four hundred forty-four".