73400724409 has 2 divisors, whose sum is σ = 73400724410. Its totient is φ = 73400724408.

The previous prime is 73400724379. The next prime is 73400724451. The reversal of 73400724409 is 90442700437.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70312477225 + 3088247184 = 265165^2 + 55572^2 .

It is a cyclic number.

It is not a de Polignac number, because 73400724409 - 2⁵ = 73400724377 is a prime.

It is not a weakly prime, because it can be changed into another prime (73400724469) 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, 36700362204 + 36700362205.

It is an arithmetic number, because the mean of its divisors is an integer number (36700362205).

Almost surely, 2^73400724409 is an apocalyptic number.

It is an amenable number.

73400724409 is a deficient number, since it is larger than the sum of its proper divisors (1).

73400724409 is an equidigital number, since it uses as much as digits as its factorization.

73400724409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 40.

The spelling of 73400724409 in words is "seventy-three billion, four hundred million, seven hundred twenty-four thousand, four hundred nine".