163764738 has 48 divisors (see below), whose sum is σ = 380293056. Its totient is φ = 50798880.

The previous prime is 163764719. The next prime is 163764739. The reversal of 163764738 is 837467361.

163764738 is a `hidden beast` number, since 1 + 637 + 6 + 4 + 7 + 3 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 163764693 and 163764702.

It is not an unprimeable number, because it can be changed into a prime (163764739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9973 + ... + 20663.

It is an arithmetic number, because the mean of its divisors is an integer number (7922772).

Almost surely, 2^163764738 is an apocalyptic number.

163764738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 163764738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190146528).

163764738 is an abundant number, since it is smaller than the sum of its proper divisors (216528318).

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

163764738 is a wasteful number, since it uses less digits than its factorization.

163764738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10759 (or 10756 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 163764738 is about 12797.0597404248. The cubic root of 163764738 is about 547.1085035089.

The spelling of 163764738 in words is "one hundred sixty-three million, seven hundred sixty-four thousand, seven hundred thirty-eight".