10000010000861 has 2 divisors, whose sum is σ = 10000010000862. Its totient is φ = 10000010000860.

The previous prime is 10000010000833. The next prime is 10000010000921. The reversal of 10000010000861 is 16800001000001.

It is a happy number.

10000010000861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9549218612761 + 450791388100 = 3090181^2 + 671410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10000010000861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10000010600861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000005000430 + 5000005000431.

It is an arithmetic number, because the mean of its divisors is an integer number (5000005000431).

Almost surely, 2^{10000010000861} is an apocalyptic number.

It is an amenable number.

10000010000861 is a deficient number, since it is larger than the sum of its proper divisors (1).

10000010000861 is an equidigital number, since it uses as much as digits as its factorization.

10000010000861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 10000010000861 its reverse (16800001000001), we get a palindrome (26800011000862).

The spelling of 10000010000861 in words is "ten trillion, ten million, eight hundred sixty-one", and thus it is an aban number.