405189857729 has 2 divisors, whose sum is σ = 405189857730. Its totient is φ = 405189857728.

The previous prime is 405189857717. The next prime is 405189857747. The reversal of 405189857729 is 927758981504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260637817729 + 144552040000 = 510527^2 + 380200^2 .

It is a cyclic number.

It is not a de Polignac number, because 405189857729 - 2¹² = 405189853633 is a prime.

It is a super-2 number, since 2×405189857729² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (405180857729) 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 as a sum of consecutive naturals, namely, 202594928864 + 202594928865.

It is an arithmetic number, because the mean of its divisors is an integer number (202594928865).

Almost surely, 2^405189857729 is an apocalyptic number.

It is an amenable number.

405189857729 is a deficient number, since it is larger than the sum of its proper divisors (1).

405189857729 is an equidigital number, since it uses as much as digits as its factorization.

405189857729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50803200, while the sum is 65.

The spelling of 405189857729 in words is "four hundred five billion, one hundred eighty-nine million, eight hundred fifty-seven thousand, seven hundred twenty-nine".