1655109120 has 320 divisors, whose sum is σ = 6406304256. Its totient is φ = 355860480.

The previous prime is 1655109101. The next prime is 1655109121. The reversal of 1655109120 is 219015561.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655109121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 913015 + ... + 914825.

Almost surely, 2^1655109120 is an apocalyptic number.

1655109120 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 1655109120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3203152128).

1655109120 is an abundant number, since it is smaller than the sum of its proper divisors (4751195136).

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

1655109120 is a wasteful number, since it uses less digits than its factorization.

1655109120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861 (or 1845 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 30.

The square root of 1655109120 is about 40683.0323353606. The cubic root of 1655109120 is about 1182.8841447046.

The spelling of 1655109120 in words is "one billion, six hundred fifty-five million, one hundred nine thousand, one hundred twenty".