49721389205 has 6 divisors (see below), whose sum is σ = 59666265378. Its totient is φ = 39776712480.

The previous prime is 49721389189. The next prime is 49721389243. The reversal of 49721389205 is 50298312794.

It can be written as a sum of positive squares in 3 ways, for example, as 2298051844 + 47423337361 = 47938^2 + 217769^2 .

It is not a de Polignac number, because 49721389205 - 2⁴ = 49721389189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 448745 + ... + 548465.

It is an arithmetic number, because the mean of its divisors is an integer number (9944377563).

Almost surely, 2^49721389205 is an apocalyptic number.

It is an amenable number.

49721389205 is a deficient number, since it is larger than the sum of its proper divisors (9944876173).

49721389205 is an frugal number, since it uses more digits than its factorization.

49721389205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199447 (or 99726 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 49721389205 in words is "forty-nine billion, seven hundred twenty-one million, three hundred eighty-nine thousand, two hundred five".