2145005215009 has 2 divisors, whose sum is σ = 2145005215010. Its totient is φ = 2145005215008.

The previous prime is 2145005214971. The next prime is 2145005215019. The reversal of 2145005215009 is 9005125005412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1916917782784 + 228087432225 = 1384528^2 + 477585^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145005215009 - 2¹⁷ = 2145005083937 is a prime.

It is not a weakly prime, because it can be changed into another prime (2145005215019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072502607504 + 1072502607505.

It is an arithmetic number, because the mean of its divisors is an integer number (1072502607505).

Almost surely, 2^{2145005215009} is an apocalyptic number.

It is an amenable number.

2145005215009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145005215009 is an equidigital number, since it uses as much as digits as its factorization.

2145005215009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 2145005215009 in words is "two trillion, one hundred forty-five billion, five million, two hundred fifteen thousand, nine".