109564328520 has 384 divisors, whose sum is σ = 371597466240. Its totient is φ = 27977564160.

The previous prime is 109564328507. The next prime is 109564328537. The reversal of 109564328520 is 25823465901.

109564328520 is a `hidden beast` number, since 1 + 0 + 9 + 564 + 3 + 2 + 85 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 196704082 + ... + 196704638.

It is an arithmetic number, because the mean of its divisors is an integer number (967701735).

Almost surely, 2^109564328520 is an apocalyptic number.

109564328520 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 109564328520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185798733120).

109564328520 is an abundant number, since it is smaller than the sum of its proper divisors (262033137720).

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

109564328520 is a wasteful number, since it uses less digits than its factorization.

109564328520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845 (or 838 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 109564328520 in words is "one hundred nine billion, five hundred sixty-four million, three hundred twenty-eight thousand, five hundred twenty".