40842385687 has 2 divisors, whose sum is σ = 40842385688. Its totient is φ = 40842385686.

The previous prime is 40842385667. The next prime is 40842385721. The reversal of 40842385687 is 78658324804.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40842385687 - 2³¹ = 38694902039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40842385637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20421192843 + 20421192844.

It is an arithmetic number, because the mean of its divisors is an integer number (20421192844).

Almost surely, 2^40842385687 is an apocalyptic number.

40842385687 is a deficient number, since it is larger than the sum of its proper divisors (1).

40842385687 is an equidigital number, since it uses as much as digits as its factorization.

40842385687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10321920, while the sum is 55.

The spelling of 40842385687 in words is "forty billion, eight hundred forty-two million, three hundred eighty-five thousand, six hundred eighty-seven".