2656573920 has 1152 divisors, whose sum is σ = 12944655360. Its totient is φ = 477757440.

The previous prime is 2656573889. The next prime is 2656573999. The reversal of 2656573920 is 293756562.

2656573920 is a `hidden beast` number, since 2 + 6 + 56 + 573 + 9 + 20 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 27387312 + ... + 27387408.

It is an arithmetic number, because the mean of its divisors is an integer number (11236680).

Almost surely, 2^2656573920 is an apocalyptic number.

2656573920 is a gapful number since it is divisible by the number (20) 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 2656573920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6472327680).

2656573920 is an abundant number, since it is smaller than the sum of its proper divisors (10288081440).

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

2656573920 is a wasteful number, since it uses less digits than its factorization.

2656573920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 45.

The square root of 2656573920 is about 51541.9627100094. The cubic root of 2656573920 is about 1384.9708569939.

The spelling of 2656573920 in words is "two billion, six hundred fifty-six million, five hundred seventy-three thousand, nine hundred twenty".