7985777008 has 80 divisors (see below), whose sum is σ = 17719865856. Its totient is φ = 3450993920.

The previous prime is 7985776963. The next prime is 7985777017. The reversal of 7985777008 is 8007775897.

It is a congruent number.

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, 670110 + ... + 681922.

Almost surely, 2^7985777008 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 7985777008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8859932928).

7985777008 is an abundant number, since it is smaller than the sum of its proper divisors (9734088848).

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

7985777008 is a wasteful number, since it uses less digits than its factorization.

7985777008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12022 (or 12016 counting only the distinct ones).

The product of its (nonzero) digits is 6914880, while the sum is 58.

The square root of 7985777008 is about 89363.1747869333. The cubic root of 7985777008 is about 1998.8140475641.

The spelling of 7985777008 in words is "seven billion, nine hundred eighty-five million, seven hundred seventy-seven thousand, eight".