21612631336163 has 16 divisors (see below), whose sum is σ = 24707094466560. Its totient is φ = 18519905010816.

The previous prime is 21612631336147. The next prime is 21612631336211. The reversal of 21612631336163 is 36163313621612.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21612631336163 - 2⁴ = 21612631336147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21612631336103) 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, 549095678 + ... + 549135036.

It is an arithmetic number, because the mean of its divisors is an integer number (1544193404160).

Almost surely, 2^{21612631336163} is an apocalyptic number.

21612631336163 is a deficient number, since it is larger than the sum of its proper divisors (3094463130397).

21612631336163 is a wasteful number, since it uses less digits than its factorization.

21612631336163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59426.

The product of its digits is 419904, while the sum is 44.

Adding to 21612631336163 its reverse (36163313621612), we get a palindrome (57775944957775).

The spelling of 21612631336163 in words is "twenty-one trillion, six hundred twelve billion, six hundred thirty-one million, three hundred thirty-six thousand, one hundred sixty-three".