163320012400 has 60 divisors (see below), whose sum is σ = 394004679904. Its totient is φ = 65056896000.

The previous prime is 163320012371. The next prime is 163320012403. The reversal of 163320012400 is 4210023361.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163320012403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 750696 + ... + 943495.

Almost surely, 2^163320012400 is an apocalyptic number.

163320012400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163320012400 is an abundant number, since it is smaller than the sum of its proper divisors (230684667504).

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

163320012400 is a wasteful number, since it uses less digits than its factorization.

163320012400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694450 (or 1694439 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 163320012400 its reverse (4210023361), we get a palindrome (167530035761).

The spelling of 163320012400 in words is "one hundred sixty-three billion, three hundred twenty million, twelve thousand, four hundred".