2155444154399 has 2 divisors, whose sum is σ = 2155444154400. Its totient is φ = 2155444154398.

The previous prime is 2155444154351. The next prime is 2155444154467. The reversal of 2155444154399 is 9934514445512.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2155444154399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2155444154299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077722077199 + 1077722077200.

It is an arithmetic number, because the mean of its divisors is an integer number (1077722077200).

Almost surely, 2^{2155444154399} is an apocalyptic number.

2155444154399 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155444154399 is an equidigital number, since it uses as much as digits as its factorization.

2155444154399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552000, while the sum is 56.

The spelling of 2155444154399 in words is "two trillion, one hundred fifty-five billion, four hundred forty-four million, one hundred fifty-four thousand, three hundred ninety-nine".