163643332601646 has 24 divisors (see below), whose sum is σ = 373221635758920. Its totient is φ = 51676841874096.

The previous prime is 163643332601597. The next prime is 163643332601653. The reversal of 163643332601646 is 646106233346361.

163643332601646 is a `hidden beast` number, since 1 + 6 + 3 + 6 + 4 + 333 + 260 + 1 + 6 + 46 = 666.

It is a super-2 number, since 2×163643332601646² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 163643332601592 and 163643332601601.

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, 239244637965 + ... + 239244638648.

It is an arithmetic number, because the mean of its divisors is an integer number (15550901489955).

Almost surely, 2^{163643332601646} is an apocalyptic number.

163643332601646 is an abundant number, since it is smaller than the sum of its proper divisors (209578303157274).

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

163643332601646 is a wasteful number, since it uses less digits than its factorization.

163643332601646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478489276640 (or 478489276637 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 54.

The spelling of 163643332601646 in words is "one hundred sixty-three trillion, six hundred forty-three billion, three hundred thirty-two million, six hundred one thousand, six hundred forty-six".