73418732729 has 4 divisors (see below), whose sum is σ = 73437413520. Its totient is φ = 73400051940.

The previous prime is 73418732707. The next prime is 73418732797. The reversal of 73418732729 is 92723781437.

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 a de Polignac number, because none of the positive numbers 2^k-73418732729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73418735729) 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, 9334499 + ... + 9342360.

It is an arithmetic number, because the mean of its divisors is an integer number (18359353380).

Almost surely, 2^73418732729 is an apocalyptic number.

It is an amenable number.

73418732729 is a deficient number, since it is larger than the sum of its proper divisors (18680791).

73418732729 is a wasteful number, since it uses less digits than its factorization.

73418732729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18680790.

The product of its digits is 3556224, while the sum is 53.

The spelling of 73418732729 in words is "seventy-three billion, four hundred eighteen million, seven hundred thirty-two thousand, seven hundred twenty-nine".