409979751659843 has 2 divisors, whose sum is σ = 409979751659844. Its totient is φ = 409979751659842.

The previous prime is 409979751659741. The next prime is 409979751659893. The reversal of 409979751659843 is 348956157979904.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 409979751659843 - 2¹⁰ = 409979751658819 is a prime.

It is a super-2 number, since 2×409979751659843² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (409979751659893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204989875829921 + 204989875829922.

It is an arithmetic number, because the mean of its divisors is an integer number (204989875829922).

Almost surely, 2^{409979751659843} is an apocalyptic number.

409979751659843 is a deficient number, since it is larger than the sum of its proper divisors (1).

409979751659843 is an equidigital number, since it uses as much as digits as its factorization.

409979751659843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18517766400, while the sum is 86.

The spelling of 409979751659843 in words is "four hundred nine trillion, nine hundred seventy-nine billion, seven hundred fifty-one million, six hundred fifty-nine thousand, eight hundred forty-three".