40828356409 has 4 divisors (see below), whose sum is σ = 40957152804. Its totient is φ = 40699560016.

The previous prime is 40828356407. The next prime is 40828356421. The reversal of 40828356409 is 90465382804.

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 1267146409 + 39561210000 = 35597^2 + 198900^2 .

It is a cyclic number.

It is not a de Polignac number, because 40828356409 - 2¹ = 40828356407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40828356403) by changing a digit.

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, 64397722 + ... + 64398355.

It is an arithmetic number, because the mean of its divisors is an integer number (10239288201).

Almost surely, 2^40828356409 is an apocalyptic number.

It is an amenable number.

40828356409 is a deficient number, since it is larger than the sum of its proper divisors (128796395).

40828356409 is a wasteful number, since it uses less digits than its factorization.

40828356409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128796394.

The product of its (nonzero) digits is 1658880, while the sum is 49.

The spelling of 40828356409 in words is "forty billion, eight hundred twenty-eight million, three hundred fifty-six thousand, four hundred nine".