645460136044706 has 8 divisors (see below), whose sum is σ = 979068745686060. Its totient is φ = 319103887482688.

The previous prime is 645460136044697. The next prime is 645460136044729. The reversal of 645460136044706 is 607440631064546.

It can be written as a sum of positive squares in 2 ways, for example, as 640194189639481 + 5265946405225 = 25302059^2 + 2294765^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1813090269611 + ... + 1813090269966.

Almost surely, 2^{645460136044706} is an apocalyptic number.

645460136044706 is a deficient number, since it is larger than the sum of its proper divisors (333608609641354).

645460136044706 is a wasteful number, since it uses less digits than its factorization.

645460136044706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3626180539668.

The product of its (nonzero) digits is 34836480, while the sum is 56.

The spelling of 645460136044706 in words is "six hundred forty-five trillion, four hundred sixty billion, one hundred thirty-six million, forty-four thousand, seven hundred six".