405811819627 has 2 divisors, whose sum is σ = 405811819628. Its totient is φ = 405811819626.

The previous prime is 405811819613. The next prime is 405811819639. The reversal of 405811819627 is 726918118504.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405811819627 is a prime.

It is not a weakly prime, because it can be changed into another prime (405811849627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202905909813 + 202905909814.

It is an arithmetic number, because the mean of its divisors is an integer number (202905909814).

Almost surely, 2^405811819627 is an apocalyptic number.

405811819627 is a deficient number, since it is larger than the sum of its proper divisors (1).

405811819627 is an equidigital number, since it uses as much as digits as its factorization.

405811819627 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 52.

The spelling of 405811819627 in words is "four hundred five billion, eight hundred eleven million, eight hundred nineteen thousand, six hundred twenty-seven".