646160413205556 has 36 divisors (see below), whose sum is σ = 1633351736625700. Its totient is φ = 215386566611328.

The previous prime is 646160413205533. The next prime is 646160413205561. The reversal of 646160413205556 is 655502314061646.

646160413205556 is a `hidden beast` number, since 6 + 4 + 6 + 1 + 60 + 4 + 1 + 3 + 20 + 5 + 556 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 134309788424100 + 511850624781456 = 11589210^2 + 22624116^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24820680 + ... + 43685088.

Almost surely, 2^{646160413205556} is an apocalyptic number.

It is an amenable number.

646160413205556 is an abundant number, since it is smaller than the sum of its proper divisors (987191323420144).

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

646160413205556 is a wasteful number, since it uses less digits than its factorization.

646160413205556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19815888 (or 19815883 counting only the distinct ones).

The product of its (nonzero) digits is 15552000, while the sum is 54.

The spelling of 646160413205556 in words is "six hundred forty-six trillion, one hundred sixty billion, four hundred thirteen million, two hundred five thousand, five hundred fifty-six".