163449972596736 has 700 divisors, whose sum is σ = 569657570175342. Its totient is φ = 46699536973824.

The previous prime is 163449972596731. The next prime is 163449972596747. The reversal of 163449972596736 is 637695279944361.

163449972596736 is a `hidden beast` number, since 1 + 6 + 3 + 4 + 499 + 7 + 2 + 5 + 96 + 7 + 36 = 666.

It can be written as a sum of positive squares in only one way, i.e., 115634407182336 + 47815565414400 = 10753344^2 + 6914880^2 .

It is a Harshad number since it is a multiple of its sum of digits (81).

It is not an unprimeable number, because it can be changed into a prime (163449972596731) by changing a digit.

It is a polite number, since it can be written in 49 ways as a sum of consecutive naturals, for example, 1593137056 + ... + 1593239648.

Almost surely, 2^{163449972596736} is an apocalyptic number.

163449972596736 is a gapful number since it is divisible by the number (16) 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 163449972596736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284828785087671).

163449972596736 is an abundant number, since it is smaller than the sum of its proper divisors (406207597578606).

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

163449972596736 is an frugal number, since it uses more digits than its factorization.

163449972596736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102659 (or 102605 counting only the distinct ones).

The product of its digits is 11110659840, while the sum is 81.

The spelling of 163449972596736 in words is "one hundred sixty-three trillion, four hundred forty-nine billion, nine hundred seventy-two million, five hundred ninety-six thousand, seven hundred thirty-six".