40008400064 has 28 divisors (see below), whose sum is σ = 79406337504. Its totient is φ = 20000504064.

The previous prime is 40008400057. The next prime is 40008400093. The reversal of 40008400064 is 46000480004.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 309449 + ... + 419255.

Almost surely, 2^40008400064 is an apocalyptic number.

It is an amenable number.

40008400064 is a deficient number, since it is larger than the sum of its proper divisors (39397937440).

40008400064 is a wasteful number, since it uses less digits than its factorization.

40008400064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115512 (or 115502 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 40008400064 its reverse (46000480004), we get a palindrome (86008880068).

The spelling of 40008400064 in words is "forty billion, eight million, four hundred thousand, sixty-four".