511301260081 has 4 divisors (see below), whose sum is σ = 523772022564. Its totient is φ = 498830497600.

The previous prime is 511301260079. The next prime is 511301260117. The reversal of 511301260081 is 180062103115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 180062103115 = 5 ⋅36012420623.

It can be written as a sum of positive squares in 2 ways, for example, as 73210830625 + 438090429456 = 270575^2 + 661884^2 .

It is a cyclic number.

It is not a de Polignac number, because 511301260081 - 2¹ = 511301260079 is a prime.

It is a super-3 number, since 3×511301260081³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (511301260021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6235381180 + ... + 6235381261.

It is an arithmetic number, because the mean of its divisors is an integer number (130943005641).

Almost surely, 2^511301260081 is an apocalyptic number.

It is an amenable number.

511301260081 is a deficient number, since it is larger than the sum of its proper divisors (12470762483).

511301260081 is a wasteful number, since it uses less digits than its factorization.

511301260081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12470762482.

The product of its (nonzero) digits is 1440, while the sum is 28.

Adding to 511301260081 its reverse (180062103115), we get a palindrome (691363363196).

The spelling of 511301260081 in words is "five hundred eleven billion, three hundred one million, two hundred sixty thousand, eighty-one".