74859390666449 has 2 divisors, whose sum is σ = 74859390666450. Its totient is φ = 74859390666448.

The previous prime is 74859390666443. The next prime is 74859390666461. The reversal of 74859390666449 is 94466609395847.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59623600743424 + 15235789923025 = 7721632^2 + 3903305^2 .

It is a cyclic number.

It is not a de Polignac number, because 74859390666449 - 2¹⁶ = 74859390600913 is a prime.

It is not a weakly prime, because it can be changed into another prime (74859390666443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37429695333224 + 37429695333225.

It is an arithmetic number, because the mean of its divisors is an integer number (37429695333225).

Almost surely, 2^{74859390666449} is an apocalyptic number.

It is an amenable number.

74859390666449 is a deficient number, since it is larger than the sum of its proper divisors (1).

74859390666449 is an equidigital number, since it uses as much as digits as its factorization.

74859390666449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8465264640, while the sum is 80.

The spelling of 74859390666449 in words is "seventy-four trillion, eight hundred fifty-nine billion, three hundred ninety million, six hundred sixty-six thousand, four hundred forty-nine".