406181192779 has 2 divisors, whose sum is σ = 406181192780. Its totient is φ = 406181192778.

The previous prime is 406181192759. The next prime is 406181192827. The reversal of 406181192779 is 977291181604.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 406181192779 - 2⁹ = 406181192267 is a prime.

It is a super-2 number, since 2×406181192779² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (406181192759) 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, 203090596389 + 203090596390.

It is an arithmetic number, because the mean of its divisors is an integer number (203090596390).

Almost surely, 2^406181192779 is an apocalyptic number.

406181192779 is a deficient number, since it is larger than the sum of its proper divisors (1).

406181192779 is an equidigital number, since it uses as much as digits as its factorization.

406181192779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1524096, while the sum is 55.

The spelling of 406181192779 in words is "four hundred six billion, one hundred eighty-one million, one hundred ninety-two thousand, seven hundred seventy-nine".