2009645019 has 16 divisors (see below), whose sum is σ = 2980902400. Its totient is φ = 1338120648.

The previous prime is 2009645017. The next prime is 2009645039. The reversal of 2009645019 is 9105469002.

2009645019 is a `hidden beast` number, since 2 + 0 + 0 + 9 + 645 + 0 + 1 + 9 = 666.

It is not a de Polignac number, because 2009645019 - 2¹ = 2009645017 is a prime.

It is a super-2 number, since 2×2009645019² = 8077346204783020722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2009645017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22999 + ... + 67440.

It is an arithmetic number, because the mean of its divisors is an integer number (186306400).

Almost surely, 2^2009645019 is an apocalyptic number.

2009645019 is a deficient number, since it is larger than the sum of its proper divisors (971257381).

2009645019 is an equidigital number, since it uses as much as digits as its factorization.

2009645019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91271 (or 91265 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 2009645019 is about 44829.0644448443. The cubic root of 2009645019 is about 1261.9431299473.

The spelling of 2009645019 in words is "two billion, nine million, six hundred forty-five thousand, nineteen".