163485478388736 has 891 divisors, whose sum is σ = 561251750272941. Its totient is φ = 45701156487168.

The previous prime is 163485478388599. The next prime is 163485478388777. The reversal of 163485478388736 is 637883874584361.

The square root of 163485478388736 is 12786144.

It is a perfect power (a square), and thus also a powerful number.

163485478388736 is a `hidden beast` number, since 1 + 6 + 3 + 4 + 8 + 5 + 478 + 38 + 87 + 36 = 666.

It can be written as a sum of positive squares in only one way, i.e., 117856209945600 + 45629268443136 = 10856160^2 + 6754944^2 .

Its product of digits (15606743040) is a multiple of the sum of its prime factors (864).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 455391304525 + ... + 455391304883.

Almost surely, 2^{163485478388736} is an apocalyptic number.

163485478388736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

163485478388736 is the 12786144-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163485478388736

163485478388736 is an abundant number, since it is smaller than the sum of its proper divisors (397766271884205).

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

163485478388736 is an frugal number, since it uses more digits than its factorization.

163485478388736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864 (or 424 counting only the distinct ones).

The product of its digits is 15606743040, while the sum is 81.

The spelling of 163485478388736 in words is "one hundred sixty-three trillion, four hundred eighty-five billion, four hundred seventy-eight million, three hundred eighty-eight thousand, seven hundred thirty-six".