80738817449 has 2 divisors, whose sum is σ = 80738817450. Its totient is φ = 80738817448.

The previous prime is 80738817433. The next prime is 80738817469. The reversal of 80738817449 is 94471883708.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76337821849 + 4400995600 = 276293^2 + 66340^2 .

It is a cyclic number.

It is not a de Polignac number, because 80738817449 - 2⁴ = 80738817433 is a prime.

It is not a weakly prime, because it can be changed into another prime (80738817469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40369408724 + 40369408725.

It is an arithmetic number, because the mean of its divisors is an integer number (40369408725).

Almost surely, 2^80738817449 is an apocalyptic number.

It is an amenable number.

80738817449 is a deficient number, since it is larger than the sum of its proper divisors (1).

80738817449 is an equidigital number, since it uses as much as digits as its factorization.

80738817449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10838016, while the sum is 59.

The spelling of 80738817449 in words is "eighty billion, seven hundred thirty-eight million, eight hundred seventeen thousand, four hundred forty-nine".