109795420545561 has 45 divisors (see below), whose sum is σ = 166509491427279. Its totient is φ = 72100305864576.

The previous prime is 109795420545553. The next prime is 109795420545593. The reversal of 109795420545561 is 165545024597901.

The square root of 109795420545561 is 10478331.

It is a perfect power (a square), and thus also a powerful number.

109795420545561 is a `hidden beast` number, since 1 + 0 + 9 + 7 + 9 + 5 + 4 + 20 + 5 + 45 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6583150035225 + 103212270510336 = 2565765^2 + 10159344^2 .

It is not a de Polignac number, because 109795420545561 - 2³ = 109795420545553 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (109795420545761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 6318424905 + ... + 6318442281.

Almost surely, 2^{109795420545561} is an apocalyptic number.

109795420545561 is the 10478331-st square number.

109795420545561 is the 5239166-th centered octagonal number.

It is an amenable number.

109795420545561 is a deficient number, since it is larger than the sum of its proper divisors (56714070881718).

109795420545561 is an frugal number, since it uses more digits than its factorization.

109795420545561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34900 (or 17447 counting only the distinct ones).

The product of its (nonzero) digits is 68040000, while the sum is 63.

The spelling of 109795420545561 in words is "one hundred nine trillion, seven hundred ninety-five billion, four hundred twenty million, five hundred forty-five thousand, five hundred sixty-one".