2156316444441 has 6 divisors (see below), whose sum is σ = 3114679308650. Its totient is φ = 1437544296288.

The previous prime is 2156316444431. The next prime is 2156316444547. The reversal of 2156316444441 is 1444446136512.

It is a happy number.

2156316444441 is a `hidden beast` number, since 2 + 1 + 5 + 6 + 3 + 164 + 44 + 441 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1906321444416 + 249995000025 = 1380696^2 + 499995^2 .

It is not a de Polignac number, because 2156316444441 - 2⁹ = 2156316443929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2156316444431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119795358016 + ... + 119795358033.

Almost surely, 2^{2156316444441} is an apocalyptic number.

It is an amenable number.

2156316444441 is a deficient number, since it is larger than the sum of its proper divisors (958362864209).

2156316444441 is a wasteful number, since it uses less digits than its factorization.

2156316444441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239590716055 (or 239590716052 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 45.

The spelling of 2156316444441 in words is "two trillion, one hundred fifty-six billion, three hundred sixteen million, four hundred forty-four thousand, four hundred forty-one".