43540326065 has 8 divisors (see below), whose sum is σ = 54520060608. Its totient is φ = 33317814640.

The previous prime is 43540326061. The next prime is 43540326073. The reversal of 43540326065 is 56062304534.

It is a happy number.

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

It is not a de Polignac number, because 43540326065 - 2² = 43540326061 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43540326061) 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, 189305651 + ... + 189305880.

It is an arithmetic number, because the mean of its divisors is an integer number (6815007576).

Almost surely, 2^43540326065 is an apocalyptic number.

It is an amenable number.

43540326065 is a deficient number, since it is larger than the sum of its proper divisors (10979734543).

43540326065 is a wasteful number, since it uses less digits than its factorization.

43540326065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378611559.

The product of its (nonzero) digits is 259200, while the sum is 38.

The spelling of 43540326065 in words is "forty-three billion, five hundred forty million, three hundred twenty-six thousand, sixty-five".