512272765681 has 8 divisors (see below), whose sum is σ = 517636088424. Its totient is φ = 506915155200.

The previous prime is 512272765657. The next prime is 512272765699. The reversal of 512272765681 is 186567272215.

It can be written as a sum of positive squares in 4 ways, for example, as 138297709456 + 373975056225 = 371884^2 + 611535^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-512272765681 is a prime.

It is a super-2 number, since 2×512272765681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (512272765601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1247650 + ... + 1606603.

It is an arithmetic number, because the mean of its divisors is an integer number (64704511053).

Almost surely, 2^512272765681 is an apocalyptic number.

It is an amenable number.

512272765681 is a deficient number, since it is larger than the sum of its proper divisors (5363322743).

512272765681 is a wasteful number, since it uses less digits than its factorization.

512272765681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2856131.

The product of its digits is 2822400, while the sum is 52.

The spelling of 512272765681 in words is "five hundred twelve billion, two hundred seventy-two million, seven hundred sixty-five thousand, six hundred eighty-one".