1656560000 has 80 divisors (see below), whose sum is σ = 4124101740. Its totient is φ = 662592000.

The previous prime is 1656559991. The next prime is 1656560047. The reversal of 1656560000 is 656561.

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

It is a congruent number.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 69647 + ... + 90353.

Almost surely, 2^1656560000 is an apocalyptic number.

1656560000 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 1656560000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2062050870).

1656560000 is an abundant number, since it is smaller than the sum of its proper divisors (2467541740).

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

1656560000 is an frugal number, since it uses more digits than its factorization.

1656560000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20741 (or 20714 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 1656560000 is about 40700.8599417752. The cubic root of 1656560000 is about 1183.2296852064.

The spelling of 1656560000 in words is "one billion, six hundred fifty-six million, five hundred sixty thousand".