640222302054263 has 4 divisors (see below), whose sum is σ = 644828217896520. Its totient is φ = 635616386212008.

The previous prime is 640222302054229. The next prime is 640222302054311. The reversal of 640222302054263 is 362450203222046.

It is a happy number.

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 640222302054263 - 2¹⁸ = 640222301792119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 640222302054263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640222302054563) 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, 2302957920920 + ... + 2302957921197.

It is an arithmetic number, because the mean of its divisors is an integer number (161207054474130).

Almost surely, 2^{640222302054263} is an apocalyptic number.

640222302054263 is a deficient number, since it is larger than the sum of its proper divisors (4605915842257).

640222302054263 is a wasteful number, since it uses less digits than its factorization.

640222302054263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4605915842256.

The product of its (nonzero) digits is 829440, while the sum is 41.

The spelling of 640222302054263 in words is "six hundred forty trillion, two hundred twenty-two billion, three hundred two million, fifty-four thousand, two hundred sixty-three".