1155651223442 has 4 divisors (see below), whose sum is σ = 1733476835166. Its totient is φ = 577825611720.

The previous prime is 1155651223411. The next prime is 1155651223459. The reversal of 1155651223442 is 2443221565511.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 840190391161 + 315460832281 = 916619^2 + 561659^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1155651223442.

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 as a sum of consecutive naturals, namely, 288912805859 + ... + 288912805862.

Almost surely, 2^{1155651223442} is an apocalyptic number.

1155651223442 is a deficient number, since it is larger than the sum of its proper divisors (577825611724).

1155651223442 is an equidigital number, since it uses as much as digits as its factorization.

1155651223442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577825611723.

The product of its digits is 288000, while the sum is 41.

Adding to 1155651223442 its reverse (2443221565511), we get a palindrome (3598872788953).

The spelling of 1155651223442 in words is "one trillion, one hundred fifty-five billion, six hundred fifty-one million, two hundred twenty-three thousand, four hundred forty-two".