73147426729 has 8 divisors (see below), whose sum is σ = 78788344712. Its totient is φ = 67508536320.

The previous prime is 73147426727. The next prime is 73147426733. The reversal of 73147426729 is 92762474137.

It can be written as a sum of positive squares in 4 ways, for example, as 3069160000 + 70078266729 = 55400^2 + 264723^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 73147426729 - 2¹ = 73147426727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73147426727) 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 7 ways as a sum of consecutive naturals, for example, 431544 + ... + 576649.

It is an arithmetic number, because the mean of its divisors is an integer number (9848543089).

Almost surely, 2^73147426729 is an apocalyptic number.

It is an amenable number.

73147426729 is a deficient number, since it is larger than the sum of its proper divisors (5640917983).

73147426729 is a wasteful number, since it uses less digits than its factorization.

73147426729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013787.

The product of its digits is 3556224, while the sum is 52.

The spelling of 73147426729 in words is "seventy-three billion, one hundred forty-seven million, four hundred twenty-six thousand, seven hundred twenty-nine".