50251256789 has 2 divisors, whose sum is σ = 50251256790. Its totient is φ = 50251256788.

The previous prime is 50251256779. The next prime is 50251256801. The reversal of 50251256789 is 98765215205.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36242640625 + 14008616164 = 190375^2 + 118358^2 .

It is a cyclic number.

It is not a de Polignac number, because 50251256789 - 2²⁰ = 50250208213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50251256729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25125628394 + 25125628395.

It is an arithmetic number, because the mean of its divisors is an integer number (25125628395).

Almost surely, 2^50251256789 is an apocalyptic number.

It is an amenable number.

50251256789 is a deficient number, since it is larger than the sum of its proper divisors (1).

50251256789 is an equidigital number, since it uses as much as digits as its factorization.

50251256789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512000, while the sum is 50.

The spelling of 50251256789 in words is "fifty billion, two hundred fifty-one million, two hundred fifty-six thousand, seven hundred eighty-nine".