109128720960 has 1120 divisors, whose sum is σ = 462255095808. Its totient is φ = 23922708480.

The previous prime is 109128720937. The next prime is 109128720979. The reversal of 109128720960 is 69027821901.

109128720960 is a `hidden beast` number, since 109 + 1 + 287 + 209 + 60 = 666.

It is a tau number, because it is divible by the number of its divisors (1120).

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 159 ways as a sum of consecutive naturals, for example, 571354465 + ... + 571354655.

Almost surely, 2^109128720960 is an apocalyptic number.

109128720960 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 109128720960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231127547904).

109128720960 is an abundant number, since it is smaller than the sum of its proper divisors (353126374848).

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

109128720960 is a wasteful number, since it uses less digits than its factorization.

109128720960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The spelling of 109128720960 in words is "one hundred nine billion, one hundred twenty-eight million, seven hundred twenty thousand, nine hundred sixty".