3165725796649 has 4 divisors (see below), whose sum is σ = 3409243165636. Its totient is φ = 2922208427664.

The previous prime is 3165725796647. The next prime is 3165725796733. The reversal of 3165725796649 is 9466975275613.

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 1111970250000 + 2053755546649 = 1054500^2 + 1433093^2 .

It is a cyclic number.

It is not a de Polignac number, because 3165725796649 - 2¹ = 3165725796647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3165725796647) 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, 121758684474 + ... + 121758684499.

It is an arithmetic number, because the mean of its divisors is an integer number (852310791409).

Almost surely, 2^{3165725796649} is an apocalyptic number.

It is an amenable number.

3165725796649 is a deficient number, since it is larger than the sum of its proper divisors (243517368987).

3165725796649 is a wasteful number, since it uses less digits than its factorization.

3165725796649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243517368986.

The product of its digits is 514382400, while the sum is 70.

The spelling of 3165725796649 in words is "three trillion, one hundred sixty-five billion, seven hundred twenty-five million, seven hundred ninety-six thousand, six hundred forty-nine".