400217689441 has 2 divisors, whose sum is σ = 400217689442. Its totient is φ = 400217689440.

The previous prime is 400217689429. The next prime is 400217689447. The reversal of 400217689441 is 144986712004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242338613841 + 157879075600 = 492279^2 + 397340^2 .

It is a cyclic number.

It is not a de Polignac number, because 400217689441 - 2⁵ = 400217689409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400217689391 and 400217689400.

It is not a weakly prime, because it can be changed into another prime (400217689447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200108844720 + 200108844721.

It is an arithmetic number, because the mean of its divisors is an integer number (200108844721).

Almost surely, 2^400217689441 is an apocalyptic number.

It is an amenable number.

400217689441 is a deficient number, since it is larger than the sum of its proper divisors (1).

400217689441 is an equidigital number, since it uses as much as digits as its factorization.

400217689441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 400217689441 in words is "four hundred billion, two hundred seventeen million, six hundred eighty-nine thousand, four hundred forty-one".