40447315385 has 16 divisors (see below), whose sum is σ = 48813153984. Its totient is φ = 32174106432.

The previous prime is 40447315361. The next prime is 40447315393. The reversal of 40447315385 is 58351374404.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40447315385 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 617834 + ... + 680156.

It is an arithmetic number, because the mean of its divisors is an integer number (3050822124).

Almost surely, 2^40447315385 is an apocalyptic number.

It is an amenable number.

40447315385 is a deficient number, since it is larger than the sum of its proper divisors (8365838599).

40447315385 is a wasteful number, since it uses less digits than its factorization.

40447315385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63064.

The product of its (nonzero) digits is 806400, while the sum is 44.

Adding to 40447315385 its reverse (58351374404), we get a palindrome (98798689789).

The spelling of 40447315385 in words is "forty billion, four hundred forty-seven million, three hundred fifteen thousand, three hundred eighty-five".