380442646891 has 2 divisors, whose sum is σ = 380442646892. Its totient is φ = 380442646890.

The previous prime is 380442646861. The next prime is 380442647023. The reversal of 380442646891 is 198646244083.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 380442646891 - 2⁷ = 380442646763 is a prime.

It is a super-2 number, since 2×380442646891² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (380442646861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190221323445 + 190221323446.

It is an arithmetic number, because the mean of its divisors is an integer number (190221323446).

Almost surely, 2^380442646891 is an apocalyptic number.

380442646891 is a deficient number, since it is larger than the sum of its proper divisors (1).

380442646891 is an equidigital number, since it uses as much as digits as its factorization.

380442646891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7962624, while the sum is 55.

The spelling of 380442646891 in words is "three hundred eighty billion, four hundred forty-two million, six hundred forty-six thousand, eight hundred ninety-one".