49999988518489 has 9 divisors (see below), whose sum is σ = 50253921625023. Its totient is φ = 49747332223512.

The previous prime is 49999988518411. The next prime is 49999988518523. The reversal of 49999988518489 is 98481588999994.

The square root of 49999988518489 is 7071067.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2338804369225 + 47661184149264 = 1529315^2 + 6903708^2 .

It is a de Polignac number, because none of the positive numbers 2^k-49999988518489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 49999988518394 and 49999988518403.

It is not an unprimeable number, because it can be changed into a prime (49999988518589) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1407124567 + ... + 1407160099.

It is an arithmetic number, because the mean of its divisors is an integer number (5583769069447).

Almost surely, 2^{49999988518489} is an apocalyptic number.

49999988518489 is the 7071067-th square number.

49999988518489 is the 3535534-th centered octagonal number.

It is an amenable number.

49999988518489 is a deficient number, since it is larger than the sum of its proper divisors (253933106534).

49999988518489 is an frugal number, since it uses more digits than its factorization.

49999988518489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71464 (or 35732 counting only the distinct ones).

The product of its digits is 174142586880, while the sum is 100.

The spelling of 49999988518489 in words is "forty-nine trillion, nine hundred ninety-nine billion, nine hundred eighty-eight million, five hundred eighteen thousand, four hundred eighty-nine".