10992811861 has 2 divisors, whose sum is σ = 10992811862. Its totient is φ = 10992811860.

The previous prime is 10992811793. The next prime is 10992811867. The reversal of 10992811861 is 16811829901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10794171025 + 198640836 = 103895^2 + 14094^2 .

It is a cyclic number.

It is not a de Polignac number, because 10992811861 - 2⁷ = 10992811733 is a prime.

It is a super-2 number, since 2×10992811861² (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 (10992811867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5496405930 + 5496405931.

It is an arithmetic number, because the mean of its divisors is an integer number (5496405931).

Almost surely, 2^10992811861 is an apocalyptic number.

It is an amenable number.

10992811861 is a deficient number, since it is larger than the sum of its proper divisors (1).

10992811861 is an equidigital number, since it uses as much as digits as its factorization.

10992811861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 46.

The spelling of 10992811861 in words is "ten billion, nine hundred ninety-two million, eight hundred eleven thousand, eight hundred sixty-one".