43275712561 has 8 divisors (see below), whose sum is σ = 44495694464. Its totient is φ = 42058381680.

The previous prime is 43275712559. The next prime is 43275712589. The reversal of 43275712561 is 16521757234.

It is a happy number.

43275712561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43275712561 - 2¹ = 43275712559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43275712061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 629625 + ... + 694966.

It is an arithmetic number, because the mean of its divisors is an integer number (5561961808).

Almost surely, 2^43275712561 is an apocalyptic number.

It is an amenable number.

43275712561 is a deficient number, since it is larger than the sum of its proper divisors (1219981903).

43275712561 is a wasteful number, since it uses less digits than its factorization.

43275712561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325511.

The product of its digits is 352800, while the sum is 43.

The spelling of 43275712561 in words is "forty-three billion, two hundred seventy-five million, seven hundred twelve thousand, five hundred sixty-one".