51615106061 has 2 divisors, whose sum is σ = 51615106062. Its totient is φ = 51615106060.

The previous prime is 51615106057. The next prime is 51615106073. The reversal of 51615106061 is 16060151615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29814583561 + 21800522500 = 172669^2 + 147650^2 .

It is a cyclic number.

It is not a de Polignac number, because 51615106061 - 2² = 51615106057 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51615126061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25807553030 + 25807553031.

It is an arithmetic number, because the mean of its divisors is an integer number (25807553031).

Almost surely, 2^51615106061 is an apocalyptic number.

It is an amenable number.

51615106061 is a deficient number, since it is larger than the sum of its proper divisors (1).

51615106061 is an equidigital number, since it uses as much as digits as its factorization.

51615106061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 32.

Adding to 51615106061 its reverse (16060151615), we get a palindrome (67675257676).

The spelling of 51615106061 in words is "fifty-one billion, six hundred fifteen million, one hundred six thousand, sixty-one".