73243933917681 has 4 divisors (see below), whose sum is σ = 97658578556912. Its totient is φ = 48829289278452.

The previous prime is 73243933917667. The next prime is 73243933917709. The reversal of 73243933917681 is 18671933934237.

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 not a de Polignac number, because 73243933917681 - 2²⁷ = 73243799699953 is a prime.

It is a super-2 number, since 2×73243933917681² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73243933913681) 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, 12207322319611 + ... + 12207322319616.

It is an arithmetic number, because the mean of its divisors is an integer number (24414644639228).

Almost surely, 2^{73243933917681} is an apocalyptic number.

It is an amenable number.

73243933917681 is a deficient number, since it is larger than the sum of its proper divisors (24414644639231).

73243933917681 is a wasteful number, since it uses less digits than its factorization.

73243933917681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24414644639230.

The product of its digits is 123451776, while the sum is 66.

The spelling of 73243933917681 in words is "seventy-three trillion, two hundred forty-three billion, nine hundred thirty-three million, nine hundred seventeen thousand, six hundred eighty-one".