49917718313 has 2 divisors, whose sum is σ = 49917718314. Its totient is φ = 49917718312.

The previous prime is 49917718309. The next prime is 49917718321. The reversal of 49917718313 is 31381771994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26578128784 + 23339589529 = 163028^2 + 152773^2 .

It is a cyclic number.

It is not a de Polignac number, because 49917718313 - 2² = 49917718309 is a prime.

It is not a weakly prime, because it can be changed into another prime (49917718303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24958859156 + 24958859157.

It is an arithmetic number, because the mean of its divisors is an integer number (24958859157).

Almost surely, 2^49917718313 is an apocalyptic number.

It is an amenable number.

49917718313 is a deficient number, since it is larger than the sum of its proper divisors (1).

49917718313 is an equidigital number, since it uses as much as digits as its factorization.

49917718313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 53.

The spelling of 49917718313 in words is "forty-nine billion, nine hundred seventeen million, seven hundred eighteen thousand, three hundred thirteen".