511990575279919 has 2 divisors, whose sum is σ = 511990575279920. Its totient is φ = 511990575279918.

The previous prime is 511990575279889. The next prime is 511990575279979. The reversal of 511990575279919 is 919972575099115.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-511990575279919 is a prime.

It is a super-2 number, since 2×511990575279919² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (511990575279979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255995287639959 + 255995287639960.

It is an arithmetic number, because the mean of its divisors is an integer number (255995287639960).

Almost surely, 2^{511990575279919} is an apocalyptic number.

511990575279919 is a deficient number, since it is larger than the sum of its proper divisors (1).

511990575279919 is an equidigital number, since it uses as much as digits as its factorization.

511990575279919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 723350250, while the sum is 79.

The spelling of 511990575279919 in words is "five hundred eleven trillion, nine hundred ninety billion, five hundred seventy-five million, two hundred seventy-nine thousand, nine hundred nineteen".