646255545603736 has 16 divisors (see below), whose sum is σ = 1211776127386200. Its totient is φ = 323115244967424.

The previous prime is 646255545603683. The next prime is 646255545603823. The reversal of 646255545603736 is 637306545552646.

It is a congruent number.

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, 1565760066 + ... + 1566172753.

Almost surely, 2^{646255545603736} is an apocalyptic number.

It is an amenable number.

646255545603736 is a deficient number, since it is larger than the sum of its proper divisors (565520581782464).

646255545603736 is a wasteful number, since it uses less digits than its factorization.

646255545603736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3131958618 (or 3131958614 counting only the distinct ones).

The product of its (nonzero) digits is 1632960000, while the sum is 67.

The spelling of 646255545603736 in words is "six hundred forty-six trillion, two hundred fifty-five billion, five hundred forty-five million, six hundred three thousand, seven hundred thirty-six".