400381200641 has 2 divisors, whose sum is σ = 400381200642. Its totient is φ = 400381200640.

The previous prime is 400381200629. The next prime is 400381200673. The reversal of 400381200641 is 146002183004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 373253793025 + 27127407616 = 610945^2 + 164704^2 .

It is a cyclic number.

It is not a de Polignac number, because 400381200641 - 2²⁶ = 400314091777 is a prime.

It is not a weakly prime, because it can be changed into another prime (400381203641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200190600320 + 200190600321.

It is an arithmetic number, because the mean of its divisors is an integer number (200190600321).

Almost surely, 2^400381200641 is an apocalyptic number.

It is an amenable number.

400381200641 is a deficient number, since it is larger than the sum of its proper divisors (1).

400381200641 is an equidigital number, since it uses as much as digits as its factorization.

400381200641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 400381200641 its reverse (146002183004), we get a palindrome (546383383645).

The spelling of 400381200641 in words is "four hundred billion, three hundred eighty-one million, two hundred thousand, six hundred forty-one".