505334424551389 has 2 divisors, whose sum is σ = 505334424551390. Its totient is φ = 505334424551388.

The previous prime is 505334424551351. The next prime is 505334424551461. The reversal of 505334424551389 is 983155424433505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 501967445436900 + 3366979114489 = 22404630^2 + 1834933^2 .

It is a cyclic number.

It is not a de Polignac number, because 505334424551389 - 2¹⁵ = 505334424518621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505334424554389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252667212275694 + 252667212275695.

It is an arithmetic number, because the mean of its divisors is an integer number (252667212275695).

Almost surely, 2^{505334424551389} is an apocalyptic number.

It is an amenable number.

505334424551389 is a deficient number, since it is larger than the sum of its proper divisors (1).

505334424551389 is an equidigital number, since it uses as much as digits as its factorization.

505334424551389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520000, while the sum is 61.

The spelling of 505334424551389 in words is "five hundred five trillion, three hundred thirty-four billion, four hundred twenty-four million, five hundred fifty-one thousand, three hundred eighty-nine".