109561866751 has 2 divisors, whose sum is σ = 109561866752. Its totient is φ = 109561866750.

The previous prime is 109561866719. The next prime is 109561866793. The reversal of 109561866751 is 157668165901.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 109561866751 - 2⁵ = 109561866719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 109561866692 and 109561866701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109561866251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54780933375 + 54780933376.

It is an arithmetic number, because the mean of its divisors is an integer number (54780933376).

Almost surely, 2^109561866751 is an apocalyptic number.

109561866751 is a deficient number, since it is larger than the sum of its proper divisors (1).

109561866751 is an equidigital number, since it uses as much as digits as its factorization.

109561866751 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2721600, while the sum is 55.

The spelling of 109561866751 in words is "one hundred nine billion, five hundred sixty-one million, eight hundred sixty-six thousand, seven hundred fifty-one".