511321666241 has 16 divisors (see below), whose sum is σ = 558854459856. Its totient is φ = 465860376576.

The previous prime is 511321666231. The next prime is 511321666253. The reversal of 511321666241 is 142666123115.

It can be written as a sum of positive squares in 8 ways, for example, as 226960771216 + 284360895025 = 476404^2 + 533255^2 .

It is a cyclic number.

It is not a de Polignac number, because 511321666241 - 2¹⁴ = 511321649857 is a prime.

It is a super-2 number, since 2×511321666241² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 511321666195 and 511321666204.

It is not an unprimeable number, because it can be changed into a prime (511321666201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1939316 + ... + 2187141.

It is an arithmetic number, because the mean of its divisors is an integer number (34928403741).

Almost surely, 2^511321666241 is an apocalyptic number.

It is an amenable number.

511321666241 is a deficient number, since it is larger than the sum of its proper divisors (47532793615).

511321666241 is a wasteful number, since it uses less digits than its factorization.

511321666241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4126708.

The product of its digits is 51840, while the sum is 38.

Adding to 511321666241 its reverse (142666123115), we get a palindrome (653987789356).

The spelling of 511321666241 in words is "five hundred eleven billion, three hundred twenty-one million, six hundred sixty-six thousand, two hundred forty-one".