511260817226881 has 4 divisors (see below), whose sum is σ = 511262852290372. Its totient is φ = 511258782163392.

The previous prime is 511260817226867. The next prime is 511260817226909. The reversal of 511260817226881 is 188622718062115.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 468191575930225 + 43069241296656 = 21637735^2 + 6562716^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-511260817226881 is a prime.

It is a super-2 number, since 2×511260817226881² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (511260817226851) 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, 1017154860 + ... + 1017657373.

It is an arithmetic number, because the mean of its divisors is an integer number (127815713072593).

Almost surely, 2^{511260817226881} is an apocalyptic number.

It is an amenable number.

511260817226881 is a deficient number, since it is larger than the sum of its proper divisors (2035063491).

511260817226881 is a wasteful number, since it uses less digits than its factorization.

511260817226881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2035063490.

The product of its (nonzero) digits is 5160960, while the sum is 58.

The spelling of 511260817226881 in words is "five hundred eleven trillion, two hundred sixty billion, eight hundred seventeen million, two hundred twenty-six thousand, eight hundred eighty-one".