646312020223 has 8 divisors (see below), whose sum is σ = 703788044400. Its totient is φ = 591181956288.

The previous prime is 646312020217. The next prime is 646312020241. The reversal of 646312020223 is 322020213646.

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

It is a cyclic number.

It is not a de Polignac number, because 646312020223 - 2²¹ = 646309923071 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 (646312020293) 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, 586489486 + ... + 586490587.

It is an arithmetic number, because the mean of its divisors is an integer number (87973505550).

Almost surely, 2^646312020223 is an apocalyptic number.

646312020223 is a deficient number, since it is larger than the sum of its proper divisors (57476024177).

646312020223 is a wasteful number, since it uses less digits than its factorization.

646312020223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172980121.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 646312020223 its reverse (322020213646), we get a palindrome (968332233869).

The spelling of 646312020223 in words is "six hundred forty-six billion, three hundred twelve million, twenty thousand, two hundred twenty-three".