1655565120 has 168 divisors, whose sum is σ = 6212250720. Its totient is φ = 401341440.

The previous prime is 1655565113. The next prime is 1655565161. The reversal of 1655565120 is 215655561.

It is a super-2 number, since 2×1655565120² = 5481791733121228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5551 + ... + 57809.

Almost surely, 2^1655565120 is an apocalyptic number.

1655565120 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 1655565120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3106125360).

1655565120 is an abundant number, since it is smaller than the sum of its proper divisors (4556685600).

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

1655565120 is a wasteful number, since it uses less digits than its factorization.

1655565120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52293 (or 52280 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The square root of 1655565120 is about 40688.6362514155. The cubic root of 1655565120 is about 1182.9927670777.

The spelling of 1655565120 in words is "one billion, six hundred fifty-five million, five hundred sixty-five thousand, one hundred twenty".