73547973909 has 12 divisors (see below), whose sum is σ = 106385810700. Its totient is φ = 48962821824.

The previous prime is 73547973853. The next prime is 73547973929. The reversal of 73547973909 is 90937974537.

73547973909 is a `hidden beast` number, since 7 + 3 + 5 + 479 + 73 + 90 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 50046164100 + 23501809809 = 223710^2 + 153303^2 .

It is not a de Polignac number, because 73547973909 - 2⁷ = 73547973781 is a prime.

It is a super-2 number, since 2×73547973909² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73547973929) 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 in 11 ways as a sum of consecutive naturals, for example, 5756664 + ... + 5769425.

It is an arithmetic number, because the mean of its divisors is an integer number (8865484225).

Almost surely, 2^73547973909 is an apocalyptic number.

It is an amenable number.

73547973909 is a deficient number, since it is larger than the sum of its proper divisors (32837836791).

73547973909 is a wasteful number, since it uses less digits than its factorization.

73547973909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11526804 (or 11526801 counting only the distinct ones).

The product of its (nonzero) digits is 45008460, while the sum is 63.

The spelling of 73547973909 in words is "seventy-three billion, five hundred forty-seven million, nine hundred seventy-three thousand, nine hundred nine".