2155444154443 has 4 divisors (see below), whose sum is σ = 2196112912128. Its totient is φ = 2114775396760.

The previous prime is 2155444154399. The next prime is 2155444154467. The reversal of 2155444154443 is 3444514445512.

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

It is a cyclic number.

It is not a de Polignac number, because 2155444154443 - 2⁹ = 2155444153931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2155444154393 and 2155444154402.

It is not an unprimeable number, because it can be changed into a prime (2155444154243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20334378763 + ... + 20334378868.

It is an arithmetic number, because the mean of its divisors is an integer number (549028228032).

Almost surely, 2^{2155444154443} is an apocalyptic number.

2155444154443 is a deficient number, since it is larger than the sum of its proper divisors (40668757685).

2155444154443 is an equidigital number, since it uses as much as digits as its factorization.

2155444154443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40668757684.

The product of its digits is 3072000, while the sum is 46.

Adding to 2155444154443 its reverse (3444514445512), we get a palindrome (5599958599955).

The spelling of 2155444154443 in words is "two trillion, one hundred fifty-five billion, four hundred forty-four million, one hundred fifty-four thousand, four hundred forty-three".