646220341263 has 8 divisors (see below), whose sum is σ = 984716710528. Its totient is φ = 369268766424.

The previous prime is 646220341243. The next prime is 646220341387. The reversal of 646220341263 is 362143022646.

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

It is not a de Polignac number, because 646220341263 - 2²⁵ = 646186786831 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 (646220341213) 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, 15386198581 + ... + 15386198622.

It is an arithmetic number, because the mean of its divisors is an integer number (123089588816).

Almost surely, 2^646220341263 is an apocalyptic number.

646220341263 is a deficient number, since it is larger than the sum of its proper divisors (338496369265).

646220341263 is a wasteful number, since it uses less digits than its factorization.

646220341263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30772397213.

The product of its (nonzero) digits is 248832, while the sum is 39.

The spelling of 646220341263 in words is "six hundred forty-six billion, two hundred twenty million, three hundred forty-one thousand, two hundred sixty-three".