411355561 has 2 divisors, whose sum is σ = 411355562. Its totient is φ = 411355560.

The previous prime is 411355541. The next prime is 411355573. The reversal of 411355561 is 165553114.

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., 370331536 + 41024025 = 19244^2 + 6405^2 .

It is a cyclic number.

It is not a de Polignac number, because 411355561 - 2⁷ = 411355433 is a prime.

It is not a weakly prime, because it can be changed into another prime (411355531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205677780 + 205677781.

It is an arithmetic number, because the mean of its divisors is an integer number (205677781).

Almost surely, 2^411355561 is an apocalyptic number.

It is an amenable number.

411355561 is a deficient number, since it is larger than the sum of its proper divisors (1).

411355561 is an equidigital number, since it uses as much as digits as its factorization.

411355561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9000, while the sum is 31.

The square root of 411355561 is about 20281.9023022990. The cubic root of 411355561 is about 743.7137157545.

The spelling of 411355561 in words is "four hundred eleven million, three hundred fifty-five thousand, five hundred sixty-one".