109009509520 has 80 divisors (see below), whose sum is σ = 261606470400. Its totient is φ = 42211901952.

The previous prime is 109009509517. The next prime is 109009509529. The reversal of 109009509520 is 25905900901.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (109009509529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 496509 + ... + 681571.

It is an arithmetic number, because the mean of its divisors is an integer number (3270080880).

Almost surely, 2^109009509520 is an apocalyptic number.

109009509520 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 109009509520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130803235200).

109009509520 is an abundant number, since it is smaller than the sum of its proper divisors (152596960880).

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

109009509520 is a wasteful number, since it uses less digits than its factorization.

109009509520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185312 (or 185306 counting only the distinct ones).

The product of its (nonzero) digits is 36450, while the sum is 40.

The spelling of 109009509520 in words is "one hundred nine billion, nine million, five hundred nine thousand, five hundred twenty".