2539849805 has 8 divisors (see below), whose sum is σ = 3048682752. Its totient is φ = 2031304528.

The previous prime is 2539849801. The next prime is 2539849817. The reversal of 2539849805 is 5089489352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2539849805 - 2² = 2539849801 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2539849801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51989 + ... + 88218.

It is an arithmetic number, because the mean of its divisors is an integer number (381085344).

Almost surely, 2^2539849805 is an apocalyptic number.

It is an amenable number.

2539849805 is a deficient number, since it is larger than the sum of its proper divisors (508832947).

2539849805 is a wasteful number, since it uses less digits than its factorization.

2539849805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143835.

The product of its (nonzero) digits is 3110400, while the sum is 53.

The square root of 2539849805 is about 50396.9225746970. The cubic root of 2539849805 is about 1364.3820958718.

The spelling of 2539849805 in words is "two billion, five hundred thirty-nine million, eight hundred forty-nine thousand, eight hundred five".