10649566709261 has 2 divisors, whose sum is σ = 10649566709262. Its totient is φ = 10649566709260.

The previous prime is 10649566709233. The next prime is 10649566709281. The reversal of 10649566709261 is 16290766594601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9919791184900 + 729775524361 = 3149570^2 + 854269^2 .

It is an emirp because it is prime and its reverse (16290766594601) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10649566709261 is a prime.

It is a super-2 number, since 2×10649566709261² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10649566709194 and 10649566709203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10649566709281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5324783354630 + 5324783354631.

It is an arithmetic number, because the mean of its divisors is an integer number (5324783354631).

Almost surely, 2^{10649566709261} is an apocalyptic number.

It is an amenable number.

10649566709261 is a deficient number, since it is larger than the sum of its proper divisors (1).

10649566709261 is an equidigital number, since it uses as much as digits as its factorization.

10649566709261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29393280, while the sum is 62.

The spelling of 10649566709261 in words is "ten trillion, six hundred forty-nine billion, five hundred sixty-six million, seven hundred nine thousand, two hundred sixty-one".