21612640773583 has 2 divisors, whose sum is σ = 21612640773584. Its totient is φ = 21612640773582.

The previous prime is 21612640773571. The next prime is 21612640773631. The reversal of 21612640773583 is 38537704621612.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21612640773583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21612640773533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10806320386791 + 10806320386792.

It is an arithmetic number, because the mean of its divisors is an integer number (10806320386792).

Almost surely, 2^{21612640773583} is an apocalyptic number.

21612640773583 is a deficient number, since it is larger than the sum of its proper divisors (1).

21612640773583 is an equidigital number, since it uses as much as digits as its factorization.

21612640773583 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10160640, while the sum is 55.

The spelling of 21612640773583 in words is "twenty-one trillion, six hundred twelve billion, six hundred forty million, seven hundred seventy-three thousand, five hundred eighty-three".