646255011216 has 20 divisors (see below), whose sum is σ = 1669492112432. Its totient is φ = 215418337056.

The previous prime is 646255011163. The next prime is 646255011251. The reversal of 646255011216 is 612110552646.

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, 6731822986 + ... + 6731823081.

Almost surely, 2^646255011216 is an apocalyptic number.

It is an amenable number.

646255011216 is an abundant number, since it is smaller than the sum of its proper divisors (1023237101216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646255011216 is a wasteful number, since it uses less digits than its factorization.

646255011216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13463646078 (or 13463646072 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 646255011216 in words is "six hundred forty-six billion, two hundred fifty-five million, eleven thousand, two hundred sixteen".