7855720704 has 216 divisors, whose sum is σ = 24991125432. Its totient is φ = 2357821440.

The previous prime is 7855720693. The next prime is 7855720751. The reversal of 7855720704 is 4070275587.

7855720704 is a `hidden beast` number, since 7 + 8 + 5 + 572 + 0 + 70 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1383840000 + 6471880704 = 37200^2 + 80448^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7855720704.

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 23 ways as a sum of consecutive naturals, for example, 1224834 + ... + 1231230.

Almost surely, 2^7855720704 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 7855720704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12495562716).

7855720704 is an abundant number, since it is smaller than the sum of its proper divisors (17135404728).

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

7855720704 is a wasteful number, since it uses less digits than its factorization.

7855720704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6473 (or 6456 counting only the distinct ones).

The product of its (nonzero) digits is 548800, while the sum is 45.

The square root of 7855720704 is about 88632.5036541336. The cubic root of 7855720704 is about 1987.9037127449.

The spelling of 7855720704 in words is "seven billion, eight hundred fifty-five million, seven hundred twenty thousand, seven hundred four".