730555406509 has 8 divisors (see below), whose sum is σ = 754996613112. Its totient is φ = 706429570560.

The previous prime is 730555406453. The next prime is 730555406519. The reversal of 730555406509 is 905604555037.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 224678844009 + 505876562500 = 474003^2 + 711250^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 730555406509 - 2⁹ = 730555405997 is a prime.

It is a super-2 number, since 2×730555406509² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730555406519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78837954 + ... + 78847219.

It is an arithmetic number, because the mean of its divisors is an integer number (94374576639).

Almost surely, 2^730555406509 is an apocalyptic number.

It is an amenable number.

730555406509 is a deficient number, since it is larger than the sum of its proper divisors (24441206603).

730555406509 is a wasteful number, since it uses less digits than its factorization.

730555406509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157685327.

The product of its (nonzero) digits is 2835000, while the sum is 49.

The spelling of 730555406509 in words is "seven hundred thirty billion, five hundred fifty-five million, four hundred six thousand, five hundred nine".