2155433719009 has 2 divisors, whose sum is σ = 2155433719010. Its totient is φ = 2155433719008.

The previous prime is 2155433719007. The next prime is 2155433719013. The reversal of 2155433719009 is 9009173345512.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2030226019600 + 125207699409 = 1424860^2 + 353847^2 .

It is a cyclic number.

It is not a de Polignac number, because 2155433719009 - 2¹ = 2155433719007 is a prime.

Together with 2155433719007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2155433719003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077716859504 + 1077716859505.

It is an arithmetic number, because the mean of its divisors is an integer number (1077716859505).

Almost surely, 2^{2155433719009} is an apocalyptic number.

It is an amenable number.

2155433719009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155433719009 is an equidigital number, since it uses as much as digits as its factorization.

2155433719009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1020600, while the sum is 49.

The spelling of 2155433719009 in words is "two trillion, one hundred fifty-five billion, four hundred thirty-three million, seven hundred nineteen thousand, nine".