7985159136 has 72 divisors (see below), whose sum is σ = 23695111440. Its totient is φ = 2545990656.

The previous prime is 7985159123. The next prime is 7985159137. The reversal of 7985159136 is 6319515897.

7985159136 is a `hidden beast` number, since 7 + 9 + 8 + 515 + 91 + 36 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7985159137) 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, 596121 + ... + 609368.

It is an arithmetic number, because the mean of its divisors is an integer number (329098770).

Almost surely, 2^7985159136 is an apocalyptic number.

It is an amenable number.

7985159136 is an abundant number, since it is smaller than the sum of its proper divisors (15709952304).

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

7985159136 is a wasteful number, since it uses less digits than its factorization.

7985159136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205528 (or 1205517 counting only the distinct ones).

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

The square root of 7985159136 is about 89359.7176360803. The cubic root of 7985159136 is about 1998.7624957829.

The spelling of 7985159136 in words is "seven billion, nine hundred eighty-five million, one hundred fifty-nine thousand, one hundred thirty-six".