6920621945856 has 352 divisors, whose sum is σ = 21719508451200. Its totient is φ = 2172991242240.

The previous prime is 6920621945819. The next prime is 6920621945873. The reversal of 6920621945856 is 6585491260296.

It is a happy number.

6920621945856 is a `hidden beast` number, since 6 + 9 + 20 + 6 + 21 + 9 + 4 + 585 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 6920621945793 and 6920621945802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32768211 + ... + 32978733.

Almost surely, 2^{6920621945856} 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 6920621945856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10859754225600).

6920621945856 is an abundant number, since it is smaller than the sum of its proper divisors (14798886505344).

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

6920621945856 is a wasteful number, since it uses less digits than its factorization.

6920621945856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210622 (or 210598 counting only the distinct ones).

The product of its (nonzero) digits is 55987200, while the sum is 63.

The spelling of 6920621945856 in words is "six trillion, nine hundred twenty billion, six hundred twenty-one million, nine hundred forty-five thousand, eight hundred fifty-six".