405358168609 has 2 divisors, whose sum is σ = 405358168610. Its totient is φ = 405358168608.

The previous prime is 405358168597. The next prime is 405358168627. The reversal of 405358168609 is 906861853504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 391434168609 + 13924000000 = 625647^2 + 118000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405358168609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 405358168609.

It is not a weakly prime, because it can be changed into another prime (405358178609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202679084304 + 202679084305.

It is an arithmetic number, because the mean of its divisors is an integer number (202679084305).

Almost surely, 2^405358168609 is an apocalyptic number.

It is an amenable number.

405358168609 is a deficient number, since it is larger than the sum of its proper divisors (1).

405358168609 is an equidigital number, since it uses as much as digits as its factorization.

405358168609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6220800, while the sum is 55.

The spelling of 405358168609 in words is "four hundred five billion, three hundred fifty-eight million, one hundred sixty-eight thousand, six hundred nine".