7991560808 has 64 divisors (see below), whose sum is σ = 18732193920. Its totient is φ = 3105158400.

The previous prime is 7991560771. The next prime is 7991560831. The reversal of 7991560808 is 8080651997.

It is a super-2 number, since 2×7991560808² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7991560808.

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, 212378 + ... + 247158.

It is an arithmetic number, because the mean of its divisors is an integer number (292690530).

Almost surely, 2^7991560808 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 7991560808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9366096960).

7991560808 is an abundant number, since it is smaller than the sum of its proper divisors (10740633112).

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

7991560808 is a wasteful number, since it uses less digits than its factorization.

7991560808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35178 (or 35174 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 53.

The square root of 7991560808 is about 89395.5301343417. The cubic root of 7991560808 is about 1999.2964865634.

The spelling of 7991560808 in words is "seven billion, nine hundred ninety-one million, five hundred sixty thousand, eight hundred eight".