400004220236645 has 8 divisors (see below), whose sum is σ = 480008840482080. Its totient is φ = 320000858723920.

The previous prime is 400004220236641. The next prime is 400004220236651. The reversal of 400004220236645 is 546632022400004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400004220236645 - 2² = 400004220236641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400004220236599 and 400004220236608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400004220236641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313983911 + ... + 315255300.

It is an arithmetic number, because the mean of its divisors is an integer number (60001105060260).

Almost surely, 2^{400004220236645} is an apocalyptic number.

It is an amenable number.

400004220236645 is a deficient number, since it is larger than the sum of its proper divisors (80004620245435).

400004220236645 is a wasteful number, since it uses less digits than its factorization.

400004220236645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629366355.

The product of its (nonzero) digits is 276480, while the sum is 38.

Adding to 400004220236645 its reverse (546632022400004), we get a palindrome (946636242636649).

The spelling of 400004220236645 in words is "four hundred trillion, four billion, two hundred twenty million, two hundred thirty-six thousand, six hundred forty-five".