501378081439 has 2 divisors, whose sum is σ = 501378081440. Its totient is φ = 501378081438.

The previous prime is 501378081433. The next prime is 501378081467. The reversal of 501378081439 is 934180873105.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 501378081439 - 2¹⁹ = 501377557151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 501378081392 and 501378081401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (501378081433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250689040719 + 250689040720.

It is an arithmetic number, because the mean of its divisors is an integer number (250689040720).

Almost surely, 2^501378081439 is an apocalyptic number.

501378081439 is a deficient number, since it is larger than the sum of its proper divisors (1).

501378081439 is an equidigital number, since it uses as much as digits as its factorization.

501378081439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 501378081439 in words is "five hundred one billion, three hundred seventy-eight million, eighty-one thousand, four hundred thirty-nine".