163603630133321 has 16 divisors (see below), whose sum is σ = 194733604696320. Its totient is φ = 134519924266560.

The previous prime is 163603630133311. The next prime is 163603630133369. The reversal of 163603630133321 is 123331036306361.

It is not a de Polignac number, because 163603630133321 - 2¹⁸ = 163603629871177 is a prime.

It is a super-2 number, since 2×163603630133321² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163603630133311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4448391806 + ... + 4448428583.

It is an arithmetic number, because the mean of its divisors is an integer number (12170850293520).

Almost surely, 2^{163603630133321} is an apocalyptic number.

It is an amenable number.

163603630133321 is a deficient number, since it is larger than the sum of its proper divisors (31129974562999).

163603630133321 is an equidigital number, since it uses as much as digits as its factorization.

163603630133321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8896820504.

The product of its (nonzero) digits is 314928, while the sum is 41.

Adding to 163603630133321 its reverse (123331036306361), we get a palindrome (286934666439682).

The spelling of 163603630133321 in words is "one hundred sixty-three trillion, six hundred three billion, six hundred thirty million, one hundred thirty-three thousand, three hundred twenty-one".