43605906081 has 4 divisors (see below), whose sum is σ = 58141208112. Its totient is φ = 29070604052.

The previous prime is 43605906079. The next prime is 43605906133. The reversal of 43605906081 is 18060950634.

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 43605906081 - 2¹ = 43605906079 is a prime.

It is a super-2 number, since 2×43605906081² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43605906881) 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, 7267651011 + ... + 7267651016.

It is an arithmetic number, because the mean of its divisors is an integer number (14535302028).

Almost surely, 2^43605906081 is an apocalyptic number.

It is an amenable number.

43605906081 is a deficient number, since it is larger than the sum of its proper divisors (14535302031).

43605906081 is a wasteful number, since it uses less digits than its factorization.

43605906081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14535302030.

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 43605906081 in words is "forty-three billion, six hundred five million, nine hundred six thousand, eighty-one".