1645616540296 has 16 divisors (see below), whose sum is σ = 3093225610140. Its totient is φ = 820756377600.

The previous prime is 1645616540291. The next prime is 1645616540297. The reversal of 1645616540296 is 6920456165461.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1048752135396 + 596864404900 = 1024086^2 + 772570^2 .

It is not an unprimeable number, because it can be changed into a prime (1645616540291) 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, 256483161 + ... + 256489576.

Almost surely, 2^{1645616540296} is an apocalyptic number.

It is an amenable number.

1645616540296 is a deficient number, since it is larger than the sum of its proper divisors (1447609069844).

1645616540296 is a wasteful number, since it uses less digits than its factorization.

1645616540296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512973144 (or 512973140 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 55.

The spelling of 1645616540296 in words is "one trillion, six hundred forty-five billion, six hundred sixteen million, five hundred forty thousand, two hundred ninety-six".