9645455665 has 16 divisors (see below), whose sum is σ = 12299046480. Its totient is φ = 7236597760.

The previous prime is 9645455663. The next prime is 9645455669. The reversal of 9645455665 is 5665545469.

It can be written as a sum of positive squares in 8 ways, for example, as 435598641 + 9209857024 = 20871^2 + 95968^2 .

It is not a de Polignac number, because 9645455665 - 2¹ = 9645455663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9645455663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178030 + ... + 225799.

It is an arithmetic number, because the mean of its divisors is an integer number (768690405).

Almost surely, 2^9645455665 is an apocalyptic number.

It is an amenable number.

9645455665 is a deficient number, since it is larger than the sum of its proper divisors (2653590815).

9645455665 is a wasteful number, since it uses less digits than its factorization.

9645455665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404132.

The product of its digits is 19440000, while the sum is 55.

The square root of 9645455665 is about 98211.2807420818. The cubic root of 9645455665 is about 2128.6662920340. Note that the first 3 decimals are identical.

The spelling of 9645455665 in words is "nine billion, six hundred forty-five million, four hundred fifty-five thousand, six hundred sixty-five".