400664020004 has 12 divisors (see below), whose sum is σ = 701216382384. Its totient is φ = 200316482184.

The previous prime is 400664019961. The next prime is 400664020007. The reversal of 400664020004 is 400020466004.

It is not an unprimeable number, because it can be changed into a prime (400664020007) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3823802 + ... + 3927185.

It is an arithmetic number, because the mean of its divisors is an integer number (58434698532).

Almost surely, 2^400664020004 is an apocalyptic number.

It is an amenable number.

400664020004 is a deficient number, since it is larger than the sum of its proper divisors (300552362380).

400664020004 is a wasteful number, since it uses less digits than its factorization.

400664020004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7763914 (or 7763912 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 400664020004 its reverse (400020466004), we get a palindrome (800684486008).

The spelling of 400664020004 in words is "four hundred billion, six hundred sixty-four million, twenty thousand, four".