2539495509 has 4 divisors (see below), whose sum is σ = 3385994016. Its totient is φ = 1692997004.

The previous prime is 2539495507. The next prime is 2539495529. The reversal of 2539495509 is 9055949352.

2539495509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2539495509 - 2¹ = 2539495507 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2539495507) 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, 423249249 + ... + 423249254.

It is an arithmetic number, because the mean of its divisors is an integer number (846498504).

Almost surely, 2^2539495509 is an apocalyptic number.

It is an amenable number.

2539495509 is a deficient number, since it is larger than the sum of its proper divisors (846498507).

2539495509 is an equidigital number, since it uses as much as digits as its factorization.

2539495509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846498506.

The product of its (nonzero) digits is 2187000, while the sum is 51.

The square root of 2539495509 is about 50393.4073962061. The cubic root of 2539495509 is about 1364.3186514906.

The spelling of 2539495509 in words is "two billion, five hundred thirty-nine million, four hundred ninety-five thousand, five hundred nine".