40405228064 has 24 divisors (see below), whose sum is σ = 80128442268. Its totient is φ = 20055147520.

The previous prime is 40405227997. The next prime is 40405228079. The reversal of 40405228064 is 46082250404.

It can be written as a sum of positive squares in 2 ways, for example, as 37594107664 + 2811120400 = 193892^2 + 53020^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4603877 + ... + 4612644.

Almost surely, 2^40405228064 is an apocalyptic number.

It is an amenable number.

40405228064 is a deficient number, since it is larger than the sum of its proper divisors (39723214204).

40405228064 is a wasteful number, since it uses less digits than its factorization.

40405228064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9216668 (or 9216660 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 35.

Adding to 40405228064 its reverse (46082250404), we get a palindrome (86487478468).

The spelling of 40405228064 in words is "forty billion, four hundred five million, two hundred twenty-eight thousand, sixty-four".