2045608517509 has 2 divisors, whose sum is σ = 2045608517510. Its totient is φ = 2045608517508.

The previous prime is 2045608517497. The next prime is 2045608517569. The reversal of 2045608517509 is 9057158065402.

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., 1837439892484 + 208168625025 = 1355522^2 + 456255^2 .

It is a cyclic number.

It is not a de Polignac number, because 2045608517509 - 2¹⁵ = 2045608484741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2045608517569) 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 as a sum of consecutive naturals, namely, 1022804258754 + 1022804258755.

It is an arithmetic number, because the mean of its divisors is an integer number (1022804258755).

Almost surely, 2^{2045608517509} is an apocalyptic number.

It is an amenable number.

2045608517509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2045608517509 is an equidigital number, since it uses as much as digits as its factorization.

2045608517509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024000, while the sum is 52.

The spelling of 2045608517509 in words is "two trillion, forty-five billion, six hundred eight million, five hundred seventeen thousand, five hundred nine".