163651601333403 has 12 divisors (see below), whose sum is σ = 236469500840040. Its totient is φ = 109062365492736.

The previous prime is 163651601333387. The next prime is 163651601333413. The reversal of 163651601333403 is 304333106156361.

163651601333403 is a `hidden beast` number, since 1 + 6 + 3 + 6 + 5 + 1 + 601 + 3 + 3 + 34 + 0 + 3 = 666.

It is not a de Polignac number, because 163651601333403 - 2⁴ = 163651601333387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163651601333413) 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, 3225145126 + ... + 3225195867.

It is an arithmetic number, because the mean of its divisors is an integer number (19705791736670).

Almost surely, 2^{163651601333403} is an apocalyptic number.

163651601333403 is a deficient number, since it is larger than the sum of its proper divisors (72817899506637).

163651601333403 is a wasteful number, since it uses less digits than its factorization.

163651601333403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6450343818 (or 6450343815 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 45.

Adding to 163651601333403 its reverse (304333106156361), we get a palindrome (467984707489764).

The spelling of 163651601333403 in words is "one hundred sixty-three trillion, six hundred fifty-one billion, six hundred one million, three hundred thirty-three thousand, four hundred three".