49850131913 has 2 divisors, whose sum is σ = 49850131914. Its totient is φ = 49850131912.

The previous prime is 49850131879. The next prime is 49850131987. The reversal of 49850131913 is 31913105894.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49493790784 + 356341129 = 222472^2 + 18877^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49850131913 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (49850151913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24925065956 + 24925065957.

It is an arithmetic number, because the mean of its divisors is an integer number (24925065957).

Almost surely, 2^49850131913 is an apocalyptic number.

It is an amenable number.

49850131913 is a deficient number, since it is larger than the sum of its proper divisors (1).

49850131913 is an equidigital number, since it uses as much as digits as its factorization.

49850131913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 44.

The spelling of 49850131913 in words is "forty-nine billion, eight hundred fifty million, one hundred thirty-one thousand, nine hundred thirteen".