7965724985 has 4 divisors (see below), whose sum is σ = 9558869988. Its totient is φ = 6372579984.

The previous prime is 7965724981. The next prime is 7965724993. The reversal of 7965724985 is 5894275697.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3120451321 + 4845273664 = 55861^2 + 69608^2 .

It is a cyclic number.

It is not a de Polignac number, because 7965724985 - 2² = 7965724981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7965724981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 796572494 + ... + 796572503.

It is an arithmetic number, because the mean of its divisors is an integer number (2389717497).

Almost surely, 2^7965724985 is an apocalyptic number.

It is an amenable number.

7965724985 is a deficient number, since it is larger than the sum of its proper divisors (1593145003).

7965724985 is a wasteful number, since it uses less digits than its factorization.

7965724985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1593145002.

The product of its digits is 38102400, while the sum is 62.

The square root of 7965724985 is about 89250.9102754700. The cubic root of 7965724985 is about 1997.1396599275.

The spelling of 7965724985 in words is "seven billion, nine hundred sixty-five million, seven hundred twenty-four thousand, nine hundred eighty-five".