67984576409 has 2 divisors, whose sum is σ = 67984576410. Its totient is φ = 67984576408.

The previous prime is 67984576357. The next prime is 67984576417. The reversal of 67984576409 is 90467548976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41601721225 + 26382855184 = 203965^2 + 162428^2 .

It is a cyclic number.

It is not a de Polignac number, because 67984576409 - 2¹⁶ = 67984510873 is a prime.

It is a super-2 number, since 2×67984576409² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (67984576459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33992288204 + 33992288205.

It is an arithmetic number, because the mean of its divisors is an integer number (33992288205).

Almost surely, 2^67984576409 is an apocalyptic number.

It is an amenable number.

67984576409 is a deficient number, since it is larger than the sum of its proper divisors (1).

67984576409 is an equidigital number, since it uses as much as digits as its factorization.

67984576409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 91445760, while the sum is 65.

The spelling of 67984576409 in words is "sixty-seven billion, nine hundred eighty-four million, five hundred seventy-six thousand, four hundred nine".