109857053611872 has 72 divisors (see below), whose sum is σ = 357035424245136. Its totient is φ = 31387729602816.

The previous prime is 109857053611829. The next prime is 109857053611873. The reversal of 109857053611872 is 278116350758901.

It is a happy number.

109857053611872 is a `hidden beast` number, since 1 + 0 + 9 + 8 + 5 + 7 + 0 + 5 + 3 + 611 + 8 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109857053611873) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27246291043 + ... + 27246295074.

It is an arithmetic number, because the mean of its divisors is an integer number (4958825336738).

Almost surely, 2^{109857053611872} is an apocalyptic number.

109857053611872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

109857053611872 is an abundant number, since it is smaller than the sum of its proper divisors (247178370633264).

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

109857053611872 is a wasteful number, since it uses less digits than its factorization.

109857053611872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54492586140 (or 54492586129 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 63.

The spelling of 109857053611872 in words is "one hundred nine trillion, eight hundred fifty-seven billion, fifty-three million, six hundred eleven thousand, eight hundred seventy-two".