7957720056 has 128 divisors (see below), whose sum is σ = 23404227840. Its totient is φ = 2222899200.

The previous prime is 7957720027. The next prime is 7957720063. The reversal of 7957720056 is 6500277597.

It is a junction number, because it is equal to n+sod(n) for n = 7957719987 and 7957720014.

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, 3956091 + ... + 3958101.

It is an arithmetic number, because the mean of its divisors is an integer number (182845530).

Almost surely, 2^7957720056 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 7957720056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11702113920).

7957720056 is an abundant number, since it is smaller than the sum of its proper divisors (15446507784).

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

7957720056 is a wasteful number, since it uses less digits than its factorization.

7957720056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3197 (or 3193 counting only the distinct ones).

The product of its (nonzero) digits is 926100, while the sum is 48.

The square root of 7957720056 is about 89206.0539201236. The cubic root of 7957720056 is about 1996.4704461222.

The spelling of 7957720056 in words is "seven billion, nine hundred fifty-seven million, seven hundred twenty thousand, fifty-six".