50778537253 has 2 divisors, whose sum is σ = 50778537254. Its totient is φ = 50778537252.

The previous prime is 50778537217. The next prime is 50778537259. The reversal of 50778537253 is 35273587705.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30020067169 + 20758470084 = 173263^2 + 144078^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50778537253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 50778537253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50778537259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25389268626 + 25389268627.

It is an arithmetic number, because the mean of its divisors is an integer number (25389268627).

Almost surely, 2^50778537253 is an apocalyptic number.

It is an amenable number.

50778537253 is a deficient number, since it is larger than the sum of its proper divisors (1).

50778537253 is an equidigital number, since it uses as much as digits as its factorization.

50778537253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6174000, while the sum is 52.

The spelling of 50778537253 in words is "fifty billion, seven hundred seventy-eight million, five hundred thirty-seven thousand, two hundred fifty-three".