49959218989 has 2 divisors, whose sum is σ = 49959218990. Its totient is φ = 49959218988.

The previous prime is 49959218977. The next prime is 49959218993. The reversal of 49959218989 is 98981295994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40727276100 + 9231942889 = 201810^2 + 96083^2 .

It is a cyclic number.

It is not a de Polignac number, because 49959218989 - 2¹³ = 49959210797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49959218189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24979609494 + 24979609495.

It is an arithmetic number, because the mean of its divisors is an integer number (24979609495).

Almost surely, 2^49959218989 is an apocalyptic number.

It is an amenable number.

49959218989 is a deficient number, since it is larger than the sum of its proper divisors (1).

49959218989 is an equidigital number, since it uses as much as digits as its factorization.

49959218989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151165440, while the sum is 73.

The spelling of 49959218989 in words is "forty-nine billion, nine hundred fifty-nine million, two hundred eighteen thousand, nine hundred eighty-nine".