50778672837421 has 2 divisors, whose sum is σ = 50778672837422. Its totient is φ = 50778672837420.

The previous prime is 50778672837419. The next prime is 50778672837433. The reversal of 50778672837421 is 12473827687705.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38820314054025 + 11958358783396 = 6230595^2 + 3458086^2 .

It is a cyclic number.

It is not a de Polignac number, because 50778672837421 - 2¹ = 50778672837419 is a prime.

Together with 50778672837419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50778672837461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25389336418710 + 25389336418711.

It is an arithmetic number, because the mean of its divisors is an integer number (25389336418711).

Almost surely, 2^{50778672837421} is an apocalyptic number.

It is an amenable number.

50778672837421 is a deficient number, since it is larger than the sum of its proper divisors (1).

50778672837421 is an equidigital number, since it uses as much as digits as its factorization.

50778672837421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221276160, while the sum is 67.

The spelling of 50778672837421 in words is "fifty trillion, seven hundred seventy-eight billion, six hundred seventy-two million, eight hundred thirty-seven thousand, four hundred twenty-one".