400386201643 has 2 divisors, whose sum is σ = 400386201644. Its totient is φ = 400386201642.

The previous prime is 400386201581. The next prime is 400386201647. The reversal of 400386201643 is 346102683004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400386201643 - 2¹³ = 400386193451 is a prime.

It is a super-2 number, since 2×400386201643² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (400386201647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200193100821 + 200193100822.

It is an arithmetic number, because the mean of its divisors is an integer number (200193100822).

Almost surely, 2^400386201643 is an apocalyptic number.

400386201643 is a deficient number, since it is larger than the sum of its proper divisors (1).

400386201643 is an equidigital number, since it uses as much as digits as its factorization.

400386201643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 37.

Adding to 400386201643 its reverse (346102683004), we get a palindrome (746488884647).

The spelling of 400386201643 in words is "four hundred billion, three hundred eighty-six million, two hundred one thousand, six hundred forty-three".