50986994809 has 9 divisors (see below), whose sum is σ = 51212661807. Its totient is φ = 50762320824.

The previous prime is 50986994789. The next prime is 50986994867. The reversal of 50986994809 is 90849968905.

The square root of 50986994809 is 225803.

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., 37424063209 + 13562931600 = 193453^2 + 116460^2 .

It is not a de Polignac number, because 50986994809 - 2²³ = 50978606201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50986994899) 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 in 8 ways as a sum of consecutive naturals, for example, 78804924 + ... + 78805570.

Almost surely, 2^50986994809 is an apocalyptic number.

50986994809 is the 225803-rd square number.

50986994809 is the 112902-nd centered octagonal number.

It is an amenable number.

50986994809 is a deficient number, since it is larger than the sum of its proper divisors (225666998).

50986994809 is an frugal number, since it uses more digits than its factorization.

50986994809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992 (or 996 counting only the distinct ones).

The product of its (nonzero) digits is 50388480, while the sum is 67.

The spelling of 50986994809 in words is "fifty billion, nine hundred eighty-six million, nine hundred ninety-four thousand, eight hundred nine".