109561866719 has 2 divisors, whose sum is σ = 109561866720. Its totient is φ = 109561866718.

The previous prime is 109561866707. The next prime is 109561866751. The reversal of 109561866719 is 917668165901.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109561866719 is a prime.

It is a super-2 number, since 2×109561866719² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109561866119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54780933359 + 54780933360.

It is an arithmetic number, because the mean of its divisors is an integer number (54780933360).

Almost surely, 2^109561866719 is an apocalyptic number.

109561866719 is a deficient number, since it is larger than the sum of its proper divisors (1).

109561866719 is an equidigital number, since it uses as much as digits as its factorization.

109561866719 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4898880, while the sum is 59.

The spelling of 109561866719 in words is "one hundred nine billion, five hundred sixty-one million, eight hundred sixty-six thousand, seven hundred nineteen".