73721306164 has 48 divisors (see below), whose sum is σ = 142579293696. Its totient is φ = 33072732000.

The previous prime is 73721306161. The next prime is 73721306177. The reversal of 73721306164 is 46160312737.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73721306161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3828649 + ... + 3847855.

It is an arithmetic number, because the mean of its divisors is an integer number (2970401952).

Almost surely, 2^73721306164 is an apocalyptic number.

It is an amenable number.

73721306164 is a deficient number, since it is larger than the sum of its proper divisors (68857987532).

73721306164 is a wasteful number, since it uses less digits than its factorization.

73721306164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20356 (or 20354 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 40.

The spelling of 73721306164 in words is "seventy-three billion, seven hundred twenty-one million, three hundred six thousand, one hundred sixty-four".