40406541365 has 4 divisors (see below), whose sum is σ = 48487849644. Its totient is φ = 32325233088.

The previous prime is 40406541299. The next prime is 40406541397. The reversal of 40406541365 is 56314560404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15034192996 + 25372348369 = 122614^2 + 159287^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40406541365 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4040654132 + ... + 4040654141.

It is an arithmetic number, because the mean of its divisors is an integer number (12121962411).

Almost surely, 2^40406541365 is an apocalyptic number.

It is an amenable number.

40406541365 is a deficient number, since it is larger than the sum of its proper divisors (8081308279).

40406541365 is an equidigital number, since it uses as much as digits as its factorization.

40406541365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8081308278.

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 40406541365 in words is "forty billion, four hundred six million, five hundred forty-one thousand, three hundred sixty-five".