1155442554421 has 8 divisors (see below), whose sum is σ = 1156153017344. Its totient is φ = 1154732310720.

The previous prime is 1155442554419. The next prime is 1155442554451. The reversal of 1155442554421 is 1244552445511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1155442554421 - 2¹ = 1155442554419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155442554451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11187106 + ... + 11289916.

It is an arithmetic number, because the mean of its divisors is an integer number (144519127168).

Almost surely, 2^{1155442554421} is an apocalyptic number.

It is an amenable number.

1155442554421 is a deficient number, since it is larger than the sum of its proper divisors (710462923).

1155442554421 is a wasteful number, since it uses less digits than its factorization.

1155442554421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109611.

The product of its digits is 640000, while the sum is 43.

Adding to 1155442554421 its reverse (1244552445511), we get a palindrome (2399994999932).

The spelling of 1155442554421 in words is "one trillion, one hundred fifty-five billion, four hundred forty-two million, five hundred fifty-four thousand, four hundred twenty-one".