109181977920 has 224 divisors, whose sum is σ = 390920630400. Its totient is φ = 28680486912.

The previous prime is 109181977901. The next prime is 109181977921. The reversal of 109181977920 is 29779181901.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109181977921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 484576 + ... + 673184.

Almost surely, 2^109181977920 is an apocalyptic number.

109181977920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 109181977920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195460315200).

109181977920 is an abundant number, since it is smaller than the sum of its proper divisors (281738652480).

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

109181977920 is a wasteful number, since it uses less digits than its factorization.

109181977920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188702 (or 188686 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 54.

The spelling of 109181977920 in words is "one hundred nine billion, one hundred eighty-one million, nine hundred seventy-seven thousand, nine hundred twenty".