6920557056 has 400 divisors, whose sum is σ = 24400104960. Its totient is φ = 1911029760.

The previous prime is 6920557051. The next prime is 6920557057. The reversal of 6920557056 is 6507550296.

6920557056 is a `hidden beast` number, since 6 + 9 + 20 + 5 + 570 + 56 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6920557051) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8999040 + ... + 8999808.

Almost surely, 2^6920557056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6920557056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12200052480).

6920557056 is an abundant number, since it is smaller than the sum of its proper divisors (17479547904).

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

6920557056 is an equidigital number, since it uses as much as digits as its factorization.

6920557056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837 (or 812 counting only the distinct ones).

The product of its (nonzero) digits is 567000, while the sum is 45.

The square root of 6920557056 is about 83189.8855390486. The cubic root of 6920557056 is about 1905.6670191963.

The spelling of 6920557056 in words is "six billion, nine hundred twenty million, five hundred fifty-seven thousand, fifty-six".