1965670849 has 8 divisors (see below), whose sum is σ = 2101507200. Its totient is φ = 1832079936.

The previous prime is 1965670841. The next prime is 1965670853. The reversal of 1965670849 is 9480765691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1965670849 - 2³ = 1965670841 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1965670849.

It is not an unprimeable number, because it can be changed into a prime (1965670841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 559549 + ... + 563050.

It is an arithmetic number, because the mean of its divisors is an integer number (262688400).

Almost surely, 2^1965670849 is an apocalyptic number.

It is an amenable number.

1965670849 is a deficient number, since it is larger than the sum of its proper divisors (135836351).

1965670849 is a wasteful number, since it uses less digits than its factorization.

1965670849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122719.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The square root of 1965670849 is about 44335.8866946405. The cubic root of 1965670849 is about 1252.6707374519.

The spelling of 1965670849 in words is "one billion, nine hundred sixty-five million, six hundred seventy thousand, eight hundred forty-nine".