50778521249 has 8 divisors (see below), whose sum is σ = 51964479072. Its totient is φ = 49592793600.

The previous prime is 50778521221. The next prime is 50778521257. The reversal of 50778521249 is 94212587705.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50778521249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 50778521197 and 50778521206.

It is not an unprimeable number, because it can be changed into a prime (50778521219) 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 7 ways as a sum of consecutive naturals, for example, 438074 + ... + 541724.

It is an arithmetic number, because the mean of its divisors is an integer number (6495559884).

Almost surely, 2^50778521249 is an apocalyptic number.

It is an amenable number.

50778521249 is a deficient number, since it is larger than the sum of its proper divisors (1185957823).

50778521249 is a wasteful number, since it uses less digits than its factorization.

50778521249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115087.

The product of its (nonzero) digits is 1411200, while the sum is 50.

The spelling of 50778521249 in words is "fifty billion, seven hundred seventy-eight million, five hundred twenty-one thousand, two hundred forty-nine".