73128908189368 has 8 divisors (see below), whose sum is σ = 137116702855080. Its totient is φ = 36564454094680.

The previous prime is 73128908189327. The next prime is 73128908189369. The reversal of 73128908189368 is 86398180982137.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×73128908189368² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 73128908189368.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73128908189369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4570556761828 + ... + 4570556761843.

It is an arithmetic number, because the mean of its divisors is an integer number (17139587856885).

Almost surely, 2^{73128908189368} is an apocalyptic number.

It is an amenable number.

73128908189368 is a deficient number, since it is larger than the sum of its proper divisors (63987794665712).

73128908189368 is a wasteful number, since it uses less digits than its factorization.

73128908189368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9141113523677 (or 9141113523673 counting only the distinct ones).

The product of its (nonzero) digits is 250822656, while the sum is 73.

The spelling of 73128908189368 in words is "seventy-three trillion, one hundred twenty-eight billion, nine hundred eight million, one hundred eighty-nine thousand, three hundred sixty-eight".