7991222560 has 48 divisors (see below), whose sum is σ = 18890884152. Its totient is φ = 3194521600.

The previous prime is 7991222539. The next prime is 7991222579. The reversal of 7991222560 is 652221997.

It can be written as a sum of positive squares in 4 ways, for example, as 7990214544 + 1008016 = 89388^2 + 1004^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 260850 + ... + 289870.

Almost surely, 2^7991222560 is an apocalyptic number.

It is an amenable number.

7991222560 is an abundant number, since it is smaller than the sum of its proper divisors (10899661592).

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

7991222560 is a wasteful number, since it uses less digits than its factorization.

7991222560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30757 (or 30749 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 7991222560 is about 89393.6382523947. The cubic root of 7991222560 is about 1999.2682789915.

The spelling of 7991222560 in words is "seven billion, nine hundred ninety-one million, two hundred twenty-two thousand, five hundred sixty".