10685361961 has 2 divisors, whose sum is σ = 10685361962. Its totient is φ = 10685361960.

The previous prime is 10685361931. The next prime is 10685361977. The reversal of 10685361961 is 16916358601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9765392400 + 919969561 = 98820^2 + 30331^2 .

It is a cyclic number.

It is not a de Polignac number, because 10685361961 - 2⁷ = 10685361833 is a prime.

It is a super-2 number, since 2×10685361961² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10685361931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5342680980 + 5342680981.

It is an arithmetic number, because the mean of its divisors is an integer number (5342680981).

Almost surely, 2^10685361961 is an apocalyptic number.

It is an amenable number.

10685361961 is a deficient number, since it is larger than the sum of its proper divisors (1).

10685361961 is an equidigital number, since it uses as much as digits as its factorization.

10685361961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 10685361961 in words is "ten billion, six hundred eighty-five million, three hundred sixty-one thousand, nine hundred sixty-one".