2405216431817 has 2 divisors, whose sum is σ = 2405216431818. Its totient is φ = 2405216431816.

The previous prime is 2405216431799. The next prime is 2405216431837. The reversal of 2405216431817 is 7181346125042.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2298874569616 + 106341862201 = 1516204^2 + 326101^2 .

It is a cyclic number.

It is not a de Polignac number, because 2405216431817 - 2¹⁸ = 2405216169673 is a prime.

It is not a weakly prime, because it can be changed into another prime (2405216431837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1202608215908 + 1202608215909.

It is an arithmetic number, because the mean of its divisors is an integer number (1202608215909).

Almost surely, 2^{2405216431817} is an apocalyptic number.

It is an amenable number.

2405216431817 is a deficient number, since it is larger than the sum of its proper divisors (1).

2405216431817 is an equidigital number, since it uses as much as digits as its factorization.

2405216431817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 44.

The spelling of 2405216431817 in words is "two trillion, four hundred five billion, two hundred sixteen million, four hundred thirty-one thousand, eight hundred seventeen".