73668545537 has 4 divisors (see below), whose sum is σ = 73736318976. Its totient is φ = 73600772100.

The previous prime is 73668545417. The next prime is 73668545551. The reversal of 73668545537 is 73554586637.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73668545537 - 2¹⁰ = 73668544513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73668545557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33885089 + ... + 33887262.

It is an arithmetic number, because the mean of its divisors is an integer number (18434079744).

Almost surely, 2^73668545537 is an apocalyptic number.

It is an amenable number.

73668545537 is a deficient number, since it is larger than the sum of its proper divisors (67773439).

73668545537 is a wasteful number, since it uses less digits than its factorization.

73668545537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67773438.

The product of its digits is 63504000, while the sum is 59.

The spelling of 73668545537 in words is "seventy-three billion, six hundred sixty-eight million, five hundred forty-five thousand, five hundred thirty-seven".