40861536806805 has 128 divisors (see below), whose sum is σ = 81681546078720. Its totient is φ = 17136770088960.

The previous prime is 40861536806801. The next prime is 40861536806807. The reversal of 40861536806805 is 50860863516804.

It is a happy number.

40861536806805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40861536806805 - 2² = 40861536806801 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40861536806801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5903829 + ... + 10797141.

It is an arithmetic number, because the mean of its divisors is an integer number (638137078740).

Almost surely, 2^{40861536806805} is an apocalyptic number.

It is an amenable number.

40861536806805 is a deficient number, since it is larger than the sum of its proper divisors (40820009271915).

40861536806805 is a wasteful number, since it uses less digits than its factorization.

40861536806805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4893591.

The product of its (nonzero) digits is 33177600, while the sum is 60.

The spelling of 40861536806805 in words is "forty trillion, eight hundred sixty-one billion, five hundred thirty-six million, eight hundred six thousand, eight hundred five".