40441781685 has 8 divisors (see below), whose sum is σ = 64706850720. Its totient is φ = 21568950224.

The previous prime is 40441781669. The next prime is 40441781687. The reversal of 40441781685 is 58618714404.

40441781685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40441781685 - 2⁴ = 40441781669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40441781687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1348059375 + ... + 1348059404.

It is an arithmetic number, because the mean of its divisors is an integer number (8088356340).

Almost surely, 2^40441781685 is an apocalyptic number.

It is an amenable number.

40441781685 is a deficient number, since it is larger than the sum of its proper divisors (24265069035).

40441781685 is a wasteful number, since it uses less digits than its factorization.

40441781685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2696118787.

The product of its (nonzero) digits is 860160, while the sum is 48.

The spelling of 40441781685 in words is "forty billion, four hundred forty-one million, seven hundred eighty-one thousand, six hundred eighty-five".