10163361721 has 4 divisors (see below), whose sum is σ = 10513822500. Its totient is φ = 9812900944.

The previous prime is 10163361713. The next prime is 10163361757. The reversal of 10163361721 is 12716336101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4108810000 + 6054551721 = 64100^2 + 77811^2 .

It is a cyclic number.

It is not a de Polignac number, because 10163361721 - 2³ = 10163361713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10163361781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175230346 + ... + 175230403.

It is an arithmetic number, because the mean of its divisors is an integer number (2628455625).

Almost surely, 2^10163361721 is an apocalyptic number.

It is an amenable number.

10163361721 is a deficient number, since it is larger than the sum of its proper divisors (350460779).

10163361721 is an equidigital number, since it uses as much as digits as its factorization.

10163361721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350460778.

The product of its (nonzero) digits is 4536, while the sum is 31.

Adding to 10163361721 its reverse (12716336101), we get a palindrome (22879697822).

The spelling of 10163361721 in words is "ten billion, one hundred sixty-three million, three hundred sixty-one thousand, seven hundred twenty-one".