40782434785 has 4 divisors (see below), whose sum is σ = 48938921748. Its totient is φ = 32625947824.

The previous prime is 40782434773. The next prime is 40782434821. The reversal of 40782434785 is 58743428704.

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 25380631969 + 15401802816 = 159313^2 + 124104^2 .

It is a cyclic number.

It is not a de Polignac number, because 40782434785 - 2⁷ = 40782434657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4078243474 + ... + 4078243483.

It is an arithmetic number, because the mean of its divisors is an integer number (12234730437).

Almost surely, 2^40782434785 is an apocalyptic number.

It is an amenable number.

40782434785 is a deficient number, since it is larger than the sum of its proper divisors (8156486963).

40782434785 is an equidigital number, since it uses as much as digits as its factorization.

40782434785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8156486962.

The product of its (nonzero) digits is 6021120, while the sum is 52.

The spelling of 40782434785 in words is "forty billion, seven hundred eighty-two million, four hundred thirty-four thousand, seven hundred eighty-five".