510561000081 has 24 divisors (see below), whose sum is σ = 804827724480. Its totient is φ = 309312693600.

The previous prime is 510561000067. The next prime is 510561000091. The reversal of 510561000081 is 180000165015.

It is not a de Polignac number, because 510561000081 - 2⁹ = 510560999569 is a prime.

It is a super-2 number, since 2×510561000081² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (510561000091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 724341 + ... + 1243298.

It is an arithmetic number, because the mean of its divisors is an integer number (33534488520).

Almost surely, 2^510561000081 is an apocalyptic number.

It is an amenable number.

510561000081 is a deficient number, since it is larger than the sum of its proper divisors (294266724399).

510561000081 is a wasteful number, since it uses less digits than its factorization.

510561000081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970277 (or 1970274 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 27.

Adding to 510561000081 its reverse (180000165015), we get a palindrome (690561165096).

The spelling of 510561000081 in words is "five hundred ten billion, five hundred sixty-one million, eighty-one", and thus it is an aban number.