50681038381 has 2 divisors, whose sum is σ = 50681038382. Its totient is φ = 50681038380.

The previous prime is 50681038379. The next prime is 50681038399. The reversal of 50681038381 is 18383018605.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50651553481 + 29484900 = 225059^2 + 5430^2 .

It is a cyclic number.

It is not a de Polignac number, because 50681038381 - 2¹ = 50681038379 is a prime.

It is a super-2 number, since 2×50681038381² (a number of 22 digits) contains 22 as substring.

Together with 50681038379, 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 (50681038301) 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 as a sum of consecutive naturals, namely, 25340519190 + 25340519191.

It is an arithmetic number, because the mean of its divisors is an integer number (25340519191).

Almost surely, 2^50681038381 is an apocalyptic number.

It is an amenable number.

50681038381 is a deficient number, since it is larger than the sum of its proper divisors (1).

50681038381 is an equidigital number, since it uses as much as digits as its factorization.

50681038381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 50681038381 in words is "fifty billion, six hundred eighty-one million, thirty-eight thousand, three hundred eighty-one".