406112121211609 has 2 divisors, whose sum is σ = 406112121211610. Its totient is φ = 406112121211608.

The previous prime is 406112121211481. The next prime is 406112121211631. The reversal of 406112121211609 is 906112121211604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 291443896905984 + 114668224305625 = 17071728^2 + 10708325^2 .

It is a cyclic number.

It is not a de Polignac number, because 406112121211609 - 2⁷ = 406112121211481 is a prime.

It is not a weakly prime, because it can be changed into another prime (406112121211309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203056060605804 + 203056060605805.

It is an arithmetic number, because the mean of its divisors is an integer number (203056060605805).

Almost surely, 2^{406112121211609} is an apocalyptic number.

It is an amenable number.

406112121211609 is a deficient number, since it is larger than the sum of its proper divisors (1).

406112121211609 is an equidigital number, since it uses as much as digits as its factorization.

406112121211609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 37.

The spelling of 406112121211609 in words is "four hundred six trillion, one hundred twelve billion, one hundred twenty-one million, two hundred eleven thousand, six hundred nine".