2145489436049 has 2 divisors, whose sum is σ = 2145489436050. Its totient is φ = 2145489436048.

The previous prime is 2145489436007. The next prime is 2145489436091. The reversal of 2145489436049 is 9406349845412.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (2145489436007) and next prime (2145489436091).

It can be written as a sum of positive squares in only one way, i.e., 1269355995649 + 876133440400 = 1126657^2 + 936020^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2145489436049 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2145489435049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072744718024 + 1072744718025.

It is an arithmetic number, because the mean of its divisors is an integer number (1072744718025).

Almost surely, 2^{2145489436049} is an apocalyptic number.

It is an amenable number.

2145489436049 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145489436049 is an equidigital number, since it uses as much as digits as its factorization.

2145489436049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29859840, while the sum is 59.

The spelling of 2145489436049 in words is "two trillion, one hundred forty-five billion, four hundred eighty-nine million, four hundred thirty-six thousand, forty-nine".