646243330011055 has 16 divisors (see below), whose sum is σ = 888954139597824. Its totient is φ = 441799497073440.

The previous prime is 646243330011049. The next prime is 646243330011079. The reversal of 646243330011055 is 550110033342646.

It is not a de Polignac number, because 646243330011055 - 2⁵ = 646243330011023 is a prime.

It is a Duffinian number.

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, 27891370807 + ... + 27891393976.

It is an arithmetic number, because the mean of its divisors is an integer number (55559633724864).

Almost surely, 2^{646243330011055} is an apocalyptic number.

646243330011055 is a deficient number, since it is larger than the sum of its proper divisors (242710809586769).

646243330011055 is a wasteful number, since it uses less digits than its factorization.

646243330011055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55782765126.

The product of its (nonzero) digits is 777600, while the sum is 43.

The spelling of 646243330011055 in words is "six hundred forty-six trillion, two hundred forty-three billion, three hundred thirty million, eleven thousand, fifty-five".