511999999997 has 2 divisors, whose sum is σ = 511999999998. Its totient is φ = 511999999996.

The previous prime is 511999999993. The next prime is 512000000009. The reversal of 511999999997 is 799999999115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 299136800356 + 212863199641 = 546934^2 + 461371^2 .

It is a cyclic number.

It is not a de Polignac number, because 511999999997 - 2² = 511999999993 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (511999999993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255999999998 + 255999999999.

It is an arithmetic number, because the mean of its divisors is an integer number (255999999999).

Almost surely, 2^511999999997 is an apocalyptic number.

It is an amenable number.

511999999997 is a deficient number, since it is larger than the sum of its proper divisors (1).

511999999997 is an equidigital number, since it uses as much as digits as its factorization.

511999999997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1506635235, while the sum is 86.

The spelling of 511999999997 in words is "five hundred eleven billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-seven".