10516781017 has 2 divisors, whose sum is σ = 10516781018. Its totient is φ = 10516781016.

The previous prime is 10516780931. The next prime is 10516781047. The reversal of 10516781017 is 71018761501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10341059481 + 175721536 = 101691^2 + 13256^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10516781017 is a prime.

It is a super-2 number, since 2×10516781017² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10516781047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5258390508 + 5258390509.

It is an arithmetic number, because the mean of its divisors is an integer number (5258390509).

Almost surely, 2^10516781017 is an apocalyptic number.

It is an amenable number.

10516781017 is a deficient number, since it is larger than the sum of its proper divisors (1).

10516781017 is an equidigital number, since it uses as much as digits as its factorization.

10516781017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11760, while the sum is 37.

The spelling of 10516781017 in words is "ten billion, five hundred sixteen million, seven hundred eighty-one thousand, seventeen".