43235666054561 has 4 divisors (see below), whose sum is σ = 43253901259824. Its totient is φ = 43217430849300.

The previous prime is 43235666054533. The next prime is 43235666054573. The reversal of 43235666054561 is 16545066653234.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43235666054561 - 2²⁶ = 43235598945697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43235666054497 and 43235666054506.

It is not an unprimeable number, because it can be changed into a prime (43235666054761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9117599075 + ... + 9117603816.

It is an arithmetic number, because the mean of its divisors is an integer number (10813475314956).

Almost surely, 2^{43235666054561} is an apocalyptic number.

It is an amenable number.

43235666054561 is a deficient number, since it is larger than the sum of its proper divisors (18235205263).

43235666054561 is a wasteful number, since it uses less digits than its factorization.

43235666054561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18235205262.

The product of its (nonzero) digits is 46656000, while the sum is 56.

The spelling of 43235666054561 in words is "forty-three trillion, two hundred thirty-five billion, six hundred sixty-six million, fifty-four thousand, five hundred sixty-one".