49999988518490 has 16 divisors (see below), whose sum is σ = 90000161453160. Its totient is φ = 19999954936320.

The previous prime is 49999988518411. The next prime is 49999988518523. The reversal of 49999988518490 is 9481588999994.

It is a happy number.

It is a Cunningham number, because it is equal to 7071067²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 18417375653209 + 31582612865281 = 4291547^2 + 5619841^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 49999988518490.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411710 + ... + 10008470.

Almost surely, 2^{49999988518490} is an apocalyptic number.

49999988518490 is a deficient number, since it is larger than the sum of its proper divisors (40000172934670).

49999988518490 is a wasteful number, since it uses less digits than its factorization.

49999988518490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10117777.

The product of its (nonzero) digits is 21767823360, while the sum is 92.

The spelling of 49999988518490 in words is "forty-nine trillion, nine hundred ninety-nine billion, nine hundred eighty-eight million, five hundred eighteen thousand, four hundred ninety".