2671206509 has 4 divisors (see below), whose sum is σ = 2671446204. Its totient is φ = 2670966816.

The previous prime is 2671206497. The next prime is 2671206521. The reversal of 2671206509 is 9056021762.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2671206497) and next prime (2671206521).

It can be written as a sum of positive squares in 2 ways, for example, as 34692100 + 2636514409 = 5890^2 + 51347^2 .

It is a cyclic number.

It is not a de Polignac number, because 2671206509 - 2⁴ = 2671206493 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2671200509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102272 + ... + 125705.

It is an arithmetic number, because the mean of its divisors is an integer number (667861551).

Almost surely, 2^2671206509 is an apocalyptic number.

It is an amenable number.

2671206509 is a deficient number, since it is larger than the sum of its proper divisors (239695).

2671206509 is a wasteful number, since it uses less digits than its factorization.

2671206509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239694.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 2671206509 is about 51683.7160912410. The cubic root of 2671206509 is about 1387.5090402679.

The spelling of 2671206509 in words is "two billion, six hundred seventy-one million, two hundred six thousand, five hundred nine".