40842385685 has 4 divisors (see below), whose sum is σ = 49010862828. Its totient is φ = 32673908544.

The previous prime is 40842385667. The next prime is 40842385687. The reversal of 40842385685 is 58658324804.

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 16145005969 + 24697379716 = 127063^2 + 157154^2 .

It is a cyclic number.

It is not a de Polignac number, because 40842385685 - 2¹⁸ = 40842123541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40842385687) 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, 4084238564 + ... + 4084238573.

It is an arithmetic number, because the mean of its divisors is an integer number (12252715707).

Almost surely, 2^40842385685 is an apocalyptic number.

It is an amenable number.

40842385685 is a deficient number, since it is larger than the sum of its proper divisors (8168477143).

40842385685 is an equidigital number, since it uses as much as digits as its factorization.

40842385685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8168477142.

The product of its (nonzero) digits is 7372800, while the sum is 53.

The spelling of 40842385685 in words is "forty billion, eight hundred forty-two million, three hundred eighty-five thousand, six hundred eighty-five".