43521132497663 has 2 divisors, whose sum is σ = 43521132497664. Its totient is φ = 43521132497662.

The previous prime is 43521132497659. The next prime is 43521132497783. The reversal of 43521132497663 is 36679423112534.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43521132497663 - 2² = 43521132497659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43521132497599 and 43521132497608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43521132497363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21760566248831 + 21760566248832.

It is an arithmetic number, because the mean of its divisors is an integer number (21760566248832).

Almost surely, 2^{43521132497663} is an apocalyptic number.

43521132497663 is a deficient number, since it is larger than the sum of its proper divisors (1).

43521132497663 is an equidigital number, since it uses as much as digits as its factorization.

43521132497663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19595520, while the sum is 56.

The spelling of 43521132497663 in words is "forty-three trillion, five hundred twenty-one billion, one hundred thirty-two million, four hundred ninety-seven thousand, six hundred sixty-three".