2539265161 has 4 divisors (see below), whose sum is σ = 2541046032. Its totient is φ = 2537484292.

The previous prime is 2539265147. The next prime is 2539265173. The reversal of 2539265161 is 1615629352.

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 2539265161 - 2¹⁹ = 2538740873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2539235161) 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, 888295 + ... + 891148.

It is an arithmetic number, because the mean of its divisors is an integer number (635261508).

Almost surely, 2^2539265161 is an apocalyptic number.

It is an amenable number.

2539265161 is a deficient number, since it is larger than the sum of its proper divisors (1780871).

2539265161 is a wasteful number, since it uses less digits than its factorization.

2539265161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780870.

The product of its digits is 97200, while the sum is 40.

The square root of 2539265161 is about 50391.1218470079. The cubic root of 2539265161 is about 1364.2773995209.

The spelling of 2539265161 in words is "two billion, five hundred thirty-nine million, two hundred sixty-five thousand, one hundred sixty-one".