645837316274 has 16 divisors (see below), whose sum is σ = 1004789456856. Its totient is φ = 311080320000.

The previous prime is 645837316213. The next prime is 645837316277. The reversal of 645837316274 is 472613738546.

It can be written as a sum of positive squares in 4 ways, for example, as 645520654249 + 316662025 = 803443^2 + 17795^2 .

It is not an unprimeable number, because it can be changed into a prime (645837316277) 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, 43198127 + ... + 43213074.

Almost surely, 2^645837316274 is an apocalyptic number.

645837316274 is a deficient number, since it is larger than the sum of its proper divisors (358952140582).

645837316274 is a wasteful number, since it uses less digits than its factorization.

645837316274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86411341.

The product of its digits is 20321280, while the sum is 56.

The spelling of 645837316274 in words is "six hundred forty-five billion, eight hundred thirty-seven million, three hundred sixteen thousand, two hundred seventy-four".