40400404004 has 6 divisors (see below), whose sum is σ = 70700707014. Its totient is φ = 20200202000.

The previous prime is 40400403941. The next prime is 40400404019. The reversal of 40400404004 is 40040400404.

It can be written as a sum of positive squares in only one way, i.e., 38275009600 + 2125394404 = 195640^2 + 46102^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5050050497 + ... + 5050050504.

It is an arithmetic number, because the mean of its divisors is an integer number (11783451169).

Almost surely, 2^40400404004 is an apocalyptic number.

It is an amenable number.

40400404004 is a deficient number, since it is larger than the sum of its proper divisors (30300303010).

40400404004 is a wasteful number, since it uses less digits than its factorization.

40400404004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10100101005 (or 10100101003 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 40400404004 its reverse (40040400404), we get a palindrome (80440804408).

The spelling of 40400404004 in words is "forty billion, four hundred million, four hundred four thousand, four".