406156651609 has 2 divisors, whose sum is σ = 406156651610. Its totient is φ = 406156651608.

The previous prime is 406156651583. The next prime is 406156651613. The reversal of 406156651609 is 906156651604.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 355964970384 + 50191681225 = 596628^2 + 224035^2 .

It is a cyclic number.

It is not a de Polignac number, because 406156651609 - 2⁹ = 406156651097 is a prime.

It is not a weakly prime, because it can be changed into another prime (406156651679) 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, 203078325804 + 203078325805.

It is an arithmetic number, because the mean of its divisors is an integer number (203078325805).

Almost surely, 2^406156651609 is an apocalyptic number.

It is an amenable number.

406156651609 is a deficient number, since it is larger than the sum of its proper divisors (1).

406156651609 is an equidigital number, since it uses as much as digits as its factorization.

406156651609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1166400, while the sum is 49.

The spelling of 406156651609 in words is "four hundred six billion, one hundred fifty-six million, six hundred fifty-one thousand, six hundred nine".