109193798581056 has 168 divisors, whose sum is σ = 358276095028800. Its totient is φ = 31147663067136.

The previous prime is 109193798581051. The next prime is 109193798581057. The reversal of 109193798581056 is 650185897391901.

109193798581056 is a `hidden beast` number, since 1 + 0 + 9 + 1 + 9 + 37 + 9 + 8 + 581 + 0 + 5 + 6 = 666.

109193798581056 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109193798581051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19458606 + ... + 24434093.

Almost surely, 2^{109193798581056} is an apocalyptic number.

109193798581056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

109193798581056 is an abundant number, since it is smaller than the sum of its proper divisors (249082296447744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

109193798581056 is a wasteful number, since it uses less digits than its factorization.

109193798581056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43893341 (or 43893328 counting only the distinct ones).

The product of its (nonzero) digits is 146966400, while the sum is 72.

The spelling of 109193798581056 in words is "one hundred nine trillion, one hundred ninety-three billion, seven hundred ninety-eight million, five hundred eighty-one thousand, fifty-six".