511643454094373 has 2 divisors, whose sum is σ = 511643454094374. Its totient is φ = 511643454094372.

The previous prime is 511643454094343. The next prime is 511643454094391. The reversal of 511643454094373 is 373490454346115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 511643454094369 + 4 = 22619537^2 + 2^2 .

It is a cyclic number.

It is not a de Polignac number, because 511643454094373 - 2²⁴ = 511643437317157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (511643454094343) 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 as a sum of consecutive naturals, namely, 255821727047186 + 255821727047187.

It is an arithmetic number, because the mean of its divisors is an integer number (255821727047187).

Almost surely, 2^{511643454094373} is an apocalyptic number.

It is an amenable number.

511643454094373 is a deficient number, since it is larger than the sum of its proper divisors (1).

511643454094373 is an equidigital number, since it uses as much as digits as its factorization.

511643454094373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65318400, while the sum is 59.

The spelling of 511643454094373 in words is "five hundred eleven trillion, six hundred forty-three billion, four hundred fifty-four million, ninety-four thousand, three hundred seventy-three".