511212339877 has 2 divisors, whose sum is σ = 511212339878. Its totient is φ = 511212339876.

The previous prime is 511212339863. The next prime is 511212339889. The reversal of 511212339877 is 778933212115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 494836274916 + 16376064961 = 703446^2 + 127969^2 .

It is a cyclic number.

It is not a de Polignac number, because 511212339877 - 2³¹ = 509064856229 is a prime.

It is a super-2 number, since 2×511212339877² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 511212339877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (511212339857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255606169938 + 255606169939.

It is an arithmetic number, because the mean of its divisors is an integer number (255606169939).

Almost surely, 2^511212339877 is an apocalyptic number.

It is an amenable number.

511212339877 is a deficient number, since it is larger than the sum of its proper divisors (1).

511212339877 is an equidigital number, since it uses as much as digits as its factorization.

511212339877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 49.

The spelling of 511212339877 in words is "five hundred eleven billion, two hundred twelve million, three hundred thirty-nine thousand, eight hundred seventy-seven".