505991269959 has 16 divisors (see below), whose sum is σ = 804557548032. Its totient is φ = 276566656608.

The previous prime is 505991269957. The next prime is 505991270003. The reversal of 505991269959 is 959962199505.

It is not a de Polignac number, because 505991269959 - 2¹ = 505991269957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a junction number, because it is equal to n+sod(n) for n = 505991269893 and 505991269902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505991269957) 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 in 15 ways as a sum of consecutive naturals, for example, 523800004 + ... + 523800969.

It is an arithmetic number, because the mean of its divisors is an integer number (50284846752).

Almost surely, 2^505991269959 is an apocalyptic number.

505991269959 is a deficient number, since it is larger than the sum of its proper divisors (298566278073).

505991269959 is a wasteful number, since it uses less digits than its factorization.

505991269959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047601006.

The product of its (nonzero) digits is 88573500, while the sum is 69.

The spelling of 505991269959 in words is "five hundred five billion, nine hundred ninety-one million, two hundred sixty-nine thousand, nine hundred fifty-nine".