405646381920467 has 2 divisors, whose sum is σ = 405646381920468. Its totient is φ = 405646381920466.

The previous prime is 405646381920463. The next prime is 405646381920557. The reversal of 405646381920467 is 764029183646504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 405646381920467 - 2² = 405646381920463 is a prime.

It is a super-2 number, since 2×405646381920467² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (405646381920463) 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 as a sum of consecutive naturals, namely, 202823190960233 + 202823190960234.

It is an arithmetic number, because the mean of its divisors is an integer number (202823190960234).

It is a 1-persistent number, because it is pandigital, but 2⋅405646381920467 = 811292763840934 is not.

Almost surely, 2^{405646381920467} is an apocalyptic number.

405646381920467 is a deficient number, since it is larger than the sum of its proper divisors (1).

405646381920467 is an equidigital number, since it uses as much as digits as its factorization.

405646381920467 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209018880, while the sum is 65.

The spelling of 405646381920467 in words is "four hundred five trillion, six hundred forty-six billion, three hundred eighty-one million, nine hundred twenty thousand, four hundred sixty-seven".