7081799985 has 48 divisors (see below), whose sum is σ = 13915137600. Its totient is φ = 3302923392.

The previous prime is 7081799983. The next prime is 7081799993. The reversal of 7081799985 is 5899971807.

7081799985 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7081799985 - 2¹ = 7081799983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7081799983) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 307455 + ... + 329684.

It is an arithmetic number, because the mean of its divisors is an integer number (289898700).

Almost surely, 2^7081799985 is an apocalyptic number.

It is an amenable number.

7081799985 is a deficient number, since it is larger than the sum of its proper divisors (6833337615).

7081799985 is a wasteful number, since it uses less digits than its factorization.

7081799985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637182 (or 637179 counting only the distinct ones).

The product of its (nonzero) digits is 11430720, while the sum is 63.

The square root of 7081799985 is about 84153.4312134687. The cubic root of 7081799985 is about 1920.3536661329.

The spelling of 7081799985 in words is "seven billion, eighty-one million, seven hundred ninety-nine thousand, nine hundred eighty-five".