10145818681 has 2 divisors, whose sum is σ = 10145818682. Its totient is φ = 10145818680.

The previous prime is 10145818679. The next prime is 10145818691. The reversal of 10145818681 is 18681854101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5672349225 + 4473469456 = 75315^2 + 66884^2 .

It is a cyclic number.

It is not a de Polignac number, because 10145818681 - 2¹ = 10145818679 is a prime.

It is a super-2 number, since 2×10145818681² (a number of 21 digits) contains 22 as substring.

Together with 10145818679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (10145818691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5072909340 + 5072909341.

It is an arithmetic number, because the mean of its divisors is an integer number (5072909341).

Almost surely, 2^10145818681 is an apocalyptic number.

It is an amenable number.

10145818681 is a deficient number, since it is larger than the sum of its proper divisors (1).

10145818681 is an equidigital number, since it uses as much as digits as its factorization.

10145818681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61440, while the sum is 43.

The spelling of 10145818681 in words is "ten billion, one hundred forty-five million, eight hundred eighteen thousand, six hundred eighty-one".