40307446521 has 12 divisors (see below), whose sum is σ = 60229518180. Its totient is φ = 25945022880.

The previous prime is 40307446499. The next prime is 40307446547. The reversal of 40307446521 is 12564470304.

It can be written as a sum of positive squares in 2 ways, for example, as 17818245225 + 22489201296 = 133485^2 + 149964^2 .

It is not a de Polignac number, because 40307446521 - 2¹¹ = 40307444473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40307446121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77217070 + ... + 77217591.

It is an arithmetic number, because the mean of its divisors is an integer number (5019126515).

Almost surely, 2^40307446521 is an apocalyptic number.

It is an amenable number.

40307446521 is a deficient number, since it is larger than the sum of its proper divisors (19922071659).

40307446521 is a wasteful number, since it uses less digits than its factorization.

40307446521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154434696 (or 154434693 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The spelling of 40307446521 in words is "forty billion, three hundred seven million, four hundred forty-six thousand, five hundred twenty-one".