49989898989 has 24 divisors (see below), whose sum is σ = 74066409144. Its totient is φ = 32470848000.

The previous prime is 49989898967. The next prime is 49989899039. The reversal of 49989898989 is 98989898994.

It can be written as a sum of positive squares in 4 ways, for example, as 3186038025 + 46803860964 = 56445^2 + 216342^2 .

It is not a de Polignac number, because 49989898989 - 2⁸ = 49989898733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 49989898899 and 49989898908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49989898289) 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 in 23 ways as a sum of consecutive naturals, for example, 191799 + ... + 369819.

It is an arithmetic number, because the mean of its divisors is an integer number (3086100381).

Almost surely, 2^49989898989 is an apocalyptic number.

It is an amenable number.

49989898989 is a deficient number, since it is larger than the sum of its proper divisors (24076510155).

49989898989 is a wasteful number, since it uses less digits than its factorization.

49989898989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178829 (or 178826 counting only the distinct ones).

The product of its digits is 8707129344, while the sum is 90.

The spelling of 49989898989 in words is "forty-nine billion, nine hundred eighty-nine million, eight hundred ninety-eight thousand, nine hundred eighty-nine".