405640885291 has 2 divisors, whose sum is σ = 405640885292. Its totient is φ = 405640885290.

The previous prime is 405640885283. The next prime is 405640885303. The reversal of 405640885291 is 192588046504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 405640885291 - 2³ = 405640885283 is a prime.

It is not a weakly prime, because it can be changed into another prime (405640885241) 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, 202820442645 + 202820442646.

It is an arithmetic number, because the mean of its divisors is an integer number (202820442646).

Almost surely, 2^405640885291 is an apocalyptic number.

405640885291 is a deficient number, since it is larger than the sum of its proper divisors (1).

405640885291 is an equidigital number, since it uses as much as digits as its factorization.

405640885291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2764800, while the sum is 52.

The spelling of 405640885291 in words is "four hundred five billion, six hundred forty million, eight hundred eighty-five thousand, two hundred ninety-one".