10510515665081 has 2 divisors, whose sum is σ = 10510515665082. Its totient is φ = 10510515665080.

The previous prime is 10510515665033. The next prime is 10510515665093. The reversal of 10510515665081 is 18056651501501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8424744256681 + 2085771408400 = 2902541^2 + 1444220^2 .

It is an emirp because it is prime and its reverse (18056651501501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10510515665081 - 2³⁰ = 10509441923257 is a prime.

It is a super-2 number, since 2×10510515665081² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10510515665381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5255257832540 + 5255257832541.

It is an arithmetic number, because the mean of its divisors is an integer number (5255257832541).

Almost surely, 2^{10510515665081} is an apocalyptic number.

It is an amenable number.

10510515665081 is a deficient number, since it is larger than the sum of its proper divisors (1).

10510515665081 is an equidigital number, since it uses as much as digits as its factorization.

10510515665081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180000, while the sum is 44.

The spelling of 10510515665081 in words is "ten trillion, five hundred ten billion, five hundred fifteen million, six hundred sixty-five thousand, eighty-one".