49426205209 has 2 divisors, whose sum is σ = 49426205210. Its totient is φ = 49426205208.

The previous prime is 49426205207. The next prime is 49426205291. The reversal of 49426205209 is 90250262494.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47937788809 + 1488416400 = 218947^2 + 38580^2 .

It is a cyclic number.

It is not a de Polignac number, because 49426205209 - 2¹ = 49426205207 is a prime.

It is a super-2 number, since 2×49426205209² (a number of 22 digits) contains 22 as substring.

Together with 49426205207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (49426205207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24713102604 + 24713102605.

It is an arithmetic number, because the mean of its divisors is an integer number (24713102605).

Almost surely, 2^49426205209 is an apocalyptic number.

It is an amenable number.

49426205209 is a deficient number, since it is larger than the sum of its proper divisors (1).

49426205209 is an equidigital number, since it uses as much as digits as its factorization.

49426205209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 49426205209 in words is "forty-nine billion, four hundred twenty-six million, two hundred five thousand, two hundred nine".