40440399985 has 16 divisors (see below), whose sum is σ = 48741403392. Its totient is φ = 32210640000.

The previous prime is 40440399983. The next prime is 40440399991. The reversal of 40440399985 is 58999304404.

40440399985 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 40440399985 - 2¹ = 40440399983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40440399983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1226637 + ... + 1259173.

It is an arithmetic number, because the mean of its divisors is an integer number (3046337712).

Almost surely, 2^40440399985 is an apocalyptic number.

It is an amenable number.

40440399985 is a deficient number, since it is larger than the sum of its proper divisors (8301003407).

40440399985 is a wasteful number, since it uses less digits than its factorization.

40440399985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33624.

The product of its (nonzero) digits is 5598720, while the sum is 55.

The spelling of 40440399985 in words is "forty billion, four hundred forty million, three hundred ninety-nine thousand, nine hundred eighty-five".