73128658363 has 4 divisors (see below), whose sum is σ = 73141227088. Its totient is φ = 73116089640.

The previous prime is 73128658331. The next prime is 73128658417. The reversal of 73128658363 is 36385682137.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 73128658363 - 2⁵ = 73128658331 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73128658363.

It is not an unprimeable number, because it can be changed into a prime (73128658063) 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 3 ways as a sum of consecutive naturals, for example, 6275631 + ... + 6287272.

It is an arithmetic number, because the mean of its divisors is an integer number (18285306772).

Almost surely, 2^73128658363 is an apocalyptic number.

73128658363 is a deficient number, since it is larger than the sum of its proper divisors (12568725).

73128658363 is a wasteful number, since it uses less digits than its factorization.

73128658363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12568724.

The product of its digits is 4354560, while the sum is 52.

The spelling of 73128658363 in words is "seventy-three billion, one hundred twenty-eight million, six hundred fifty-eight thousand, three hundred sixty-three".