10635555661 has 2 divisors, whose sum is σ = 10635555662. Its totient is φ = 10635555660.

The previous prime is 10635555617. The next prime is 10635555743. The reversal of 10635555661 is 16655553601.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9686299561 + 949256100 = 98419^2 + 30810^2 .

It is a cyclic number.

It is not a de Polignac number, because 10635555661 - 2¹¹ = 10635553613 is a prime.

It is a super-2 number, since 2×10635555661² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10635555611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5317777830 + 5317777831.

It is an arithmetic number, because the mean of its divisors is an integer number (5317777831).

Almost surely, 2^10635555661 is an apocalyptic number.

It is an amenable number.

10635555661 is a deficient number, since it is larger than the sum of its proper divisors (1).

10635555661 is an equidigital number, since it uses as much as digits as its factorization.

10635555661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 405000, while the sum is 43.

The spelling of 10635555661 in words is "ten billion, six hundred thirty-five million, five hundred fifty-five thousand, six hundred sixty-one".