2415665009 has 2 divisors, whose sum is σ = 2415665010. Its totient is φ = 2415665008.

The previous prime is 2415664943. The next prime is 2415665017. The reversal of 2415665009 is 9005665142.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2095075984 + 320589025 = 45772^2 + 17905^2 .

It is a cyclic number.

It is not a de Polignac number, because 2415665009 - 2⁸ = 2415664753 is a prime.

It is not a weakly prime, because it can be changed into another prime (2415665029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1207832504 + 1207832505.

It is an arithmetic number, because the mean of its divisors is an integer number (1207832505).

Almost surely, 2^2415665009 is an apocalyptic number.

It is an amenable number.

2415665009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2415665009 is an equidigital number, since it uses as much as digits as its factorization.

2415665009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 2415665009 is about 49149.4151440279. The cubic root of 2415665009 is about 1341.7725500959.

The spelling of 2415665009 in words is "two billion, four hundred fifteen million, six hundred sixty-five thousand, nine".