21610512975743 has 2 divisors, whose sum is σ = 21610512975744. Its totient is φ = 21610512975742.

The previous prime is 21610512975739. The next prime is 21610512975767. The reversal of 21610512975743 is 34757921501612.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21610512975743 - 2² = 21610512975739 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21610515975743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10805256487871 + 10805256487872.

It is an arithmetic number, because the mean of its divisors is an integer number (10805256487872).

Almost surely, 2^{21610512975743} is an apocalyptic number.

21610512975743 is a deficient number, since it is larger than the sum of its proper divisors (1).

21610512975743 is an equidigital number, since it uses as much as digits as its factorization.

21610512975743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3175200, while the sum is 53.

The spelling of 21610512975743 in words is "twenty-one trillion, six hundred ten billion, five hundred twelve million, nine hundred seventy-five thousand, seven hundred forty-three".