645653460343 has 4 divisors (see below), whose sum is σ = 647569346320. Its totient is φ = 643737574368.

The previous prime is 645653460289. The next prime is 645653460373. The reversal of 645653460343 is 343064356546.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 645653460343 - 2¹³ = 645653452151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645653460373) 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, 957942483 + ... + 957943156.

It is an arithmetic number, because the mean of its divisors is an integer number (161892336580).

Almost surely, 2^645653460343 is an apocalyptic number.

645653460343 is a deficient number, since it is larger than the sum of its proper divisors (1915885977).

645653460343 is a wasteful number, since it uses less digits than its factorization.

645653460343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915885976.

The product of its (nonzero) digits is 9331200, while the sum is 49.

The spelling of 645653460343 in words is "six hundred forty-five billion, six hundred fifty-three million, four hundred sixty thousand, three hundred forty-three".