2155444154441 has 4 divisors (see below), whose sum is σ = 2155467906000. Its totient is φ = 2155420402884.

The previous prime is 2155444154399. The next prime is 2155444154467. The reversal of 2155444154441 is 1444514445512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2155444154441 - 2³⁴ = 2138264285257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2155444154392 and 2155444154401.

It is not an unprimeable number, because it can be changed into a prime (2155444154641) 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, 11739131 + ... + 11921328.

It is an arithmetic number, because the mean of its divisors is an integer number (538866976500).

Almost surely, 2^{2155444154441} is an apocalyptic number.

It is an amenable number.

2155444154441 is a deficient number, since it is larger than the sum of its proper divisors (23751559).

2155444154441 is an equidigital number, since it uses as much as digits as its factorization.

2155444154441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23751558.

The product of its digits is 1024000, while the sum is 44.

Adding to 2155444154441 its reverse (1444514445512), we get a palindrome (3599958599953).

The spelling of 2155444154441 in words is "two trillion, one hundred fifty-five billion, four hundred forty-four million, one hundred fifty-four thousand, four hundred forty-one".