10815782917 has 2 divisors, whose sum is σ = 10815782918. Its totient is φ = 10815782916.

The previous prime is 10815782893. The next prime is 10815782951. The reversal of 10815782917 is 71928751801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10799574241 + 16208676 = 103921^2 + 4026^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10815782917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10815782017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5407891458 + 5407891459.

It is an arithmetic number, because the mean of its divisors is an integer number (5407891459).

Almost surely, 2^10815782917 is an apocalyptic number.

It is an amenable number.

10815782917 is a deficient number, since it is larger than the sum of its proper divisors (1).

10815782917 is an equidigital number, since it uses as much as digits as its factorization.

10815782917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 49.

The spelling of 10815782917 in words is "ten billion, eight hundred fifteen million, seven hundred eighty-two thousand, nine hundred seventeen".