10556817582917 has 2 divisors, whose sum is σ = 10556817582918. Its totient is φ = 10556817582916.

The previous prime is 10556817582803. The next prime is 10556817582977. The reversal of 10556817582917 is 71928571865501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5419518816196 + 5137298766721 = 2327986^2 + 2266561^2 .

It is a cyclic number.

It is not a de Polignac number, because 10556817582917 - 2²⁸ = 10556549147461 is a prime.

It is a super-2 number, since 2×10556817582917² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10556817582977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5278408791458 + 5278408791459.

It is an arithmetic number, because the mean of its divisors is an integer number (5278408791459).

Almost surely, 2^{10556817582917} is an apocalyptic number.

It is an amenable number.

10556817582917 is a deficient number, since it is larger than the sum of its proper divisors (1).

10556817582917 is an equidigital number, since it uses as much as digits as its factorization.

10556817582917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336000, while the sum is 65.

The spelling of 10556817582917 in words is "ten trillion, five hundred fifty-six billion, eight hundred seventeen million, five hundred eighty-two thousand, nine hundred seventeen".