73684639172 has 12 divisors (see below), whose sum is σ = 134554558656. Its totient is φ = 35240479560.

The previous prime is 73684639139. The next prime is 73684639177. The reversal of 73684639172 is 27193648637.

It is not an unprimeable number, because it can be changed into a prime (73684639177) 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, 400459904 + ... + 400460087.

It is an arithmetic number, because the mean of its divisors is an integer number (11212879888).

Almost surely, 2^73684639172 is an apocalyptic number.

It is an amenable number.

73684639172 is a deficient number, since it is larger than the sum of its proper divisors (60869919484).

73684639172 is a wasteful number, since it uses less digits than its factorization.

73684639172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800920018 (or 800920016 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 56.

The spelling of 73684639172 in words is "seventy-three billion, six hundred eighty-four million, six hundred thirty-nine thousand, one hundred seventy-two".