163639904739552 has 384 divisors, whose sum is σ = 497242904094720. Its totient is φ = 52310955202560.

The previous prime is 163639904739517. The next prime is 163639904739569. The reversal of 163639904739552 is 255937409936361.

163639904739552 is a `hidden beast` number, since 1 + 6 + 3 + 6 + 39 + 9 + 0 + 4 + 7 + 39 + 552 = 666.

It is a super-2 number, since 2×163639904739552² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1143519718 + ... + 1143662810.

It is an arithmetic number, because the mean of its divisors is an integer number (1294903396080).

Almost surely, 2^{163639904739552} is an apocalyptic number.

163639904739552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163639904739552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248621452047360).

163639904739552 is an abundant number, since it is smaller than the sum of its proper divisors (333602999355168).

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

163639904739552 is a wasteful number, since it uses less digits than its factorization.

163639904739552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143663 (or 143649 counting only the distinct ones).

The product of its (nonzero) digits is 992023200, while the sum is 72.

The spelling of 163639904739552 in words is "one hundred sixty-three trillion, six hundred thirty-nine billion, nine hundred four million, seven hundred thirty-nine thousand, five hundred fifty-two".