7985611539 has 12 divisors (see below), whose sum is σ = 11544456456. Its totient is φ = 5319271392.

The previous prime is 7985611507. The next prime is 7985611541. The reversal of 7985611539 is 9351165897.

7985611539 is a `hidden beast` number, since 7 + 98 + 5 + 6 + 11 + 539 = 666.

7985611539 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 7985611539 - 2⁵ = 7985611507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7985616539) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 361137 + ... + 382610.

It is an arithmetic number, because the mean of its divisors is an integer number (962038038).

Almost surely, 2^7985611539 is an apocalyptic number.

7985611539 is a deficient number, since it is larger than the sum of its proper divisors (3558844917).

7985611539 is a wasteful number, since it uses less digits than its factorization.

7985611539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744946 (or 744943 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 54.

The square root of 7985611539 is about 89362.2489589424. The cubic root of 7985611539 is about 1998.8002420176.

The spelling of 7985611539 in words is "seven billion, nine hundred eighty-five million, six hundred eleven thousand, five hundred thirty-nine".