7985169538 has 4 divisors (see below), whose sum is σ = 11977754310. Its totient is φ = 3992584768.

The previous prime is 7985169487. The next prime is 7985169547. The reversal of 7985169538 is 8359615897.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5433606369 + 2551563169 = 73713^2 + 50513^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1996292383 + ... + 1996292386.

Almost surely, 2^7985169538 is an apocalyptic number.

7985169538 is a deficient number, since it is larger than the sum of its proper divisors (3992584772).

7985169538 is a wasteful number, since it uses less digits than its factorization.

7985169538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3992584771.

The product of its digits is 16329600, while the sum is 61.

The square root of 7985169538 is about 89359.7758390205. The cubic root of 7985169538 is about 1998.7633636896.

The spelling of 7985169538 in words is "seven billion, nine hundred eighty-five million, one hundred sixty-nine thousand, five hundred thirty-eight".