7820556620 has 48 divisors (see below), whose sum is σ = 16965220608. Its totient is φ = 3025121280.

The previous prime is 7820556581. The next prime is 7820556661. The reversal of 7820556620 is 266550287.

It is a super-2 number, since 2×7820556620² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1048424 + ... + 1055856.

It is an arithmetic number, because the mean of its divisors is an integer number (353442096).

Almost surely, 2^7820556620 is an apocalyptic number.

It is an amenable number.

7820556620 is an abundant number, since it is smaller than the sum of its proper divisors (9144663988).

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

7820556620 is a wasteful number, since it uses less digits than its factorization.

7820556620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9170 (or 9168 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 7820556620 is about 88433.9110296497. The cubic root of 7820556620 is about 1984.9331652719.

The spelling of 7820556620 in words is "seven billion, eight hundred twenty million, five hundred fifty-six thousand, six hundred twenty".