409861161559 has 2 divisors, whose sum is σ = 409861161560. Its totient is φ = 409861161558.

The previous prime is 409861161509. The next prime is 409861161617. The reversal of 409861161559 is 955161168904.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 409861161559 - 2¹⁷ = 409861030487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409861161509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204930580779 + 204930580780.

It is an arithmetic number, because the mean of its divisors is an integer number (204930580780).

Almost surely, 2^409861161559 is an apocalyptic number.

409861161559 is a deficient number, since it is larger than the sum of its proper divisors (1).

409861161559 is an equidigital number, since it uses as much as digits as its factorization.

409861161559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2332800, while the sum is 55.

It can be divided in two parts, 4098611 and 61559, that added together give a triangular number (4160170 = T₂₈₈₄).

The spelling of 409861161559 in words is "four hundred nine billion, eight hundred sixty-one million, one hundred sixty-one thousand, five hundred fifty-nine".