724600561409 has 4 divisors (see below), whose sum is σ = 744184360404. Its totient is φ = 705016762416.

The previous prime is 724600561403. The next prime is 724600561411. The reversal of 724600561409 is 904165006427.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 264841978384 + 459758583025 = 514628^2 + 678055^2 .

It is a cyclic number.

It is not a de Polignac number, because 724600561409 - 2¹⁶ = 724600495873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 724600561409.

It is not an unprimeable number, because it can be changed into a prime (724600561403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9791899442 + ... + 9791899515.

It is an arithmetic number, because the mean of its divisors is an integer number (186046090101).

Almost surely, 2^724600561409 is an apocalyptic number.

It is an amenable number.

724600561409 is a deficient number, since it is larger than the sum of its proper divisors (19583798995).

724600561409 is a wasteful number, since it uses less digits than its factorization.

724600561409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19583798994.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 724600561409 in words is "seven hundred twenty-four billion, six hundred million, five hundred sixty-one thousand, four hundred nine".