505659979439 has 2 divisors, whose sum is σ = 505659979440. Its totient is φ = 505659979438.

The previous prime is 505659979427. The next prime is 505659979453. The reversal of 505659979439 is 934979956505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505659979439 - 2¹⁶ = 505659913903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505659975439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252829989719 + 252829989720.

It is an arithmetic number, because the mean of its divisors is an integer number (252829989720).

Almost surely, 2^505659979439 is an apocalyptic number.

505659979439 is a deficient number, since it is larger than the sum of its proper divisors (1).

505659979439 is an equidigital number, since it uses as much as digits as its factorization.

505659979439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 413343000, while the sum is 71.

The spelling of 505659979439 in words is "five hundred five billion, six hundred fifty-nine million, nine hundred seventy-nine thousand, four hundred thirty-nine".