163916685504 has 840 divisors, whose sum is σ = 584344558512. Its totient is φ = 45028638720.

The previous prime is 163916685469. The next prime is 163916685511. The reversal of 163916685504 is 405586619361.

163916685504 is a `hidden beast` number, since 1 + 63 + 9 + 16 + 68 + 5 + 504 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 703504972 + ... + 703505204.

Almost surely, 2^163916685504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163916685504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292172279256).

163916685504 is an abundant number, since it is smaller than the sum of its proper divisors (420427873008).

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

163916685504 is a wasteful number, since it uses less digits than its factorization.

163916685504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The spelling of 163916685504 in words is "one hundred sixty-three billion, nine hundred sixteen million, six hundred eighty-five thousand, five hundred four".