646255011215 has 16 divisors (see below), whose sum is σ = 846598690080. Its totient is φ = 469674683520.

The previous prime is 646255011163. The next prime is 646255011251. The reversal of 646255011215 is 512110552646.

It is not a de Polignac number, because 646255011215 - 2¹⁸ = 646254749071 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4032704 + ... + 4189893.

It is an arithmetic number, because the mean of its divisors is an integer number (52912418130).

Almost surely, 2^646255011215 is an apocalyptic number.

646255011215 is a deficient number, since it is larger than the sum of its proper divisors (200343678865).

646255011215 is a wasteful number, since it uses less digits than its factorization.

646255011215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8224042.

The product of its (nonzero) digits is 72000, while the sum is 38.

The spelling of 646255011215 in words is "six hundred forty-six billion, two hundred fifty-five million, eleven thousand, two hundred fifteen".